Linbell G2 - Wireless Door Bell review

We all should be very familiar with doorbells, especially multi-storey buildings, which are rarely without doorbells. Technology is changing rapidly now, and the doorbell will continue to live in our daily lives, although there are other high-tech products, but they often remain complex in settings, and requires all aspects of a workable network, so a simple and practical solution will always save the day. 

The market has a variety of doorbell products, for low cost doorbell, it may not last longer than a month, for a better quality doorbell, the battery may not last that long without replacement, if we do not replace the battery, corrosion may occurs and may damage the doorbell. Battery disposal will also be harmful to the environment.

Main Technologies

Linbell G2 self-power new generation wireless doorbell requires no battery, using the pressing of button to convert kinetic energy into electrical energy, to achieve the self-generating power. For installation, it requires no wiring as in the traditional doorbell, as it operates on a wireless transmission, with up to 100 metres distance, and if configured with 3 relays, it can reach a maximum of 300 metres*.

Linbell G2 has solved the dead battery problem for traditional doorbell, by using a self-generating power design, without any battery required. The self-generating power is achieved by pressing the transmitter, which has a patented built-in energy harvesting technology called "Worm Micro energy generator", which only requires 350g of pressing pressure, and had significantly reduced the pressing force required to generate the power to send the signal to the receiver.

Every tiny innovation is the result of numerous and repeated trials in over a thousand times of calculations, in the process of designing and manufacturing, a lot of tests are being done to find out the most suitable number of pressure in the button, which now Linbell guarantee 200,000 pressing commitments.

After receiving signal, the receiver emmits sound and small LED light hint. Originally used in mobile phone, the product has an inside hidden luminous Led. The transmission distance between the transmitter and receiver is 100 metres, but the receiver has 3 replay functions, so the transmission distance can be extended to 300 metres*  

* Depending on the numbers of walls in between, which may weaken the signal slightly, depending on material of walls.

The lightweight doorbell is also water proof, suitable for both indoor and outdoor installation for the transmitter. In order to meet the requirements of different people, it also offer four level adjustable volume, and had 38 music tunes for selection, to solve traditional boring "ding-dong" sound.

Different combinations of Transmitter and Receivers

Variations of usage

Apart from being deployed as door bell, Linbell G2 can also be used as beepers and deployed as patient calling device in hospital, senior citizen calling device, pregnant calling device at home, and even as wake up music alarm for you children in the morning.

Installation

Packaging

Packaging with brown paper packaging, after removing the outer cover, two doorbell is unfolding before us, a receiver and a transmitter, with circular design in pure white, giving a elegant modern look.

For the accessories, it comes with a manual, fixing screws, 3M double-tape, and "Please ring the doorbell" stickers in Chinese.

Linbell G2 self-generation wireless doorbell receiver.

Linbell G2 self-generation wireless doorbell consist of 2 devices, the receiver and the transmitter respectively, the picture above is the receiver, with a circular design, in white color. It is made of fireproof PC material, with a small round lobe at the lower end as indicator light, when someone presses the doorbell, there will be blue flashing lights and sound of doorbell tune selected.

The receiver comes in diameter of 37mm with thickness of 20mm, slightly larger if compared to the traditional doorbell, but this make it easier to locate the doorbell position. There are two buttons at the side, function both as volume keys and music tune selection. There are 4 adjustable volume for selection, which can be adjusted according to the immediate needs of the volume, the music tunes also solve the relatively boring "ding-dong" sound, with 38 selectable musical tunes.

The receiver comes in international 2-pin socket, with common voltage of 220V, the speaker is located below two interpolation, with a raised design, so that the speaker sound is not obstructed when we inserted the receiver into the wall power socket.

Linbell G2 self-generation wireless doorbell transmitter end

The transmitter uses the same circular white design, with the front added an LED blue light that will lit in blue light when we pressed. This is a consistent design with small and exquisite shape.

When the transmitter button is pressed, the pressing kinetic energy is converted into electrical energy, to achieve self-generating power, where no batteries are required to achieve a permanent use. The pressing force is just 350g, which is enough to achieve self-generating power, and directly transmitted to the receiver end. The receiving distance is pretty wide range, with up to 100 meters wireless range.

Installation Reminders

The doorbell transmitter is not recommended to be fit on metal door, if you want to have better wireless strength, choose the wooden doors, in order to maximize the wireless range.

The accompanied 3M double-tape adhesive can be directly attached to the transmitter, using the 3M adhesive can ensure a solid paste on the wall, you can tear off without leaving adhesive residue.

Installation is particularly convenient, just plug the receiver directly into the power outlet, and the transmitter with 3M stickers affixed to the door, up to 100 meters, in the actual test, the distance can go about 80 meters without any delay and the response of the wireless receiver is still relatively stable.

Overall, it takes a relatively simple way to install and use, the plug and play, without complex operation that is to be completed to support the 100 m long distance wireless.

Watch the following Linbell G2 video to know more about the design of the product




Selectable 38 Music Tunes
You can select any of the 38 built-in music tunes and the default doorbell sound, sample of the 38 tunes can be listened from the video below, to select, simply press the "down" button on the receiver.
 

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Purchasing reference for Linbell G2, plus installation

Special purchase reference

The Linbell G2 series of doorbell has a very unique feature, it can be configured with different numbers of transmitters and receivers, depending on the requirements of deployments.

For buyer's convenience, all doorbell set had already been coded out of the box when shipped, which means it is ready to be used. Coding is necessary when adding or replacing the transmitter. Through coding, one transmitter can control from one to several receivers, or several transmitters can control one receiver.

The followings are one transmitter configured with one to multiple receivers, up to a maximum of 4 receivers.

One : one -  for less than 1,600 square feet apartment

One : two -  for more than 1,600 square feet, two floors or other large units

One : three -  for more than 1,600 square feet, three floors or requires receives install in rooms

One : four -  for more than 1,600 square feet, multiple floors or requires receives install in multi rooms

The followings are multiple transmitters configured with one the same receiver:

Two : one - for special unit with two doors or entrance
Two : Two - for special unit with two doors and multi floors

Installation Guide

You can add or remove any new components anytime later, by pairing it to any existing Linbell transmitter(s) / receiver(s), the following are the adding / deleting codes.

If your existing transmitter is already fitted onto the wall, just mount the new receivers on an extension cord and bring it near the mounted transmitter for pairing.

Product Specifications

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Mi Air Purifier - Maintenance the Sensor

The Black Sponge
Some batch of air purifier comes with a black sponge inside the sensor cover, some asked whether the sponge needs to be removed.

Xiaomi had explained that the black sponge is to protect the purifier sensors, in order to block the dust from sticking to the sensor, you do not need to remove it.

Of course, do not panic if you do not have sponge inside your sensor cover, as Xiaomi's support team had explained, different batches are using different protection method, if no sponges found with your sensor, do not worry.

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Mi Air Purifier English Manual Translated by Cavarii Online Store

We had translated the original Chinese Manual into English, for the benefits of Cavarii Online Store buyers.

 

                                                   Air Purifier Gen 1                                      Air Purifier Gen 2

If you had bought an unit of the Xiaomi Generation 1 or 2 Air purifier from us, please email to online@cavarii.com with your order number, for a copy of the translated English manual.

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Mi Air Purifier - Unboxing

This is the packaging of the Mi Air Purifier, in the standard Mi brown paper box, the packaging measured 31 x 31 x 80cm, weight around 10kg.

After breaking the seal, you can see the packing information.

The brochures, user guides and warranty card are all packed in an envelope. 

Purifier is enclosed in foam block. Take away the foam block, there is another layer bag wrapping the purifier.

The purifier comes in a rounded rectangular body, the front with only the Mi logo, on the top side there are two bars acting as both handle and air outlet. The top is the outlet grille, on the grille lower right side is a control switch and wifi running status indicator. The far right side is the LED lamp light sensor.

The top is the outlet grille, on the grille lower right side is a control switch and wifi running status indicator. The far right side is the LED lamp light sensor.

At the side of the handle is the chamfered edge, the inside are the air through-duct.

On the bottom half of the air purifier are neat mesh of air inlets, the official nominal count is 5732.

The bottom cover can be opened, the power cord is inside the triangular paper box nicely tugged in the gap between the cartridge and the housing.


A quick installation guide for the filter.

Tear off the plastic wrapping the filter, this is the label for the standard filter with model M1-FL.

The lever at the bottom can be swing to lock and unlock the filter cartridge.

This is the power cord, coming in a 3-pin plug, you may need a converter to fit into your local socket.

The outer layer of the filter cartridge is PET (unsaturated polyester) mesh-net, it is used to isolate the hair, fabrics, fines and other large suspended solids.

Filter mesh-net come in 161 folded layers, forming a blocking hollow drum. Filter is HEPA (high efficiency particulate air filter fine particles), which can be expanded to the length of 7m. For the adsorption of PM2.5, PM0.3, pollen and other particulate matter, officially declared effective filtration rate of 99.3% for PM0.3. The official specs for the coconut shell activated carbon is in the innermost layer, invisible to us...... purifier activated carbon is mainly used for adsorption of formaldehyde, benzene, ammonia and other inorganic toxic gases.

For ease of cleaning, the outlet of the fan can be opened. Turn the grill to open the top-level grille, unscrew the fan cover to remove the fan and fixed rotary vane.

Surrounding rotary vane grille are protection / isolation, at the bottom you can see the officially mentioned four air ducts.

The air purifier can controlled by the app, the app's main function is the remote control switch, and understand and getting info on the surrounding air quality. Applications will be combined with the local weather forecast (although only China cities' forecast is available) and even air quality, providing recommendations to open the windows or switch on the air purifiers. 

It can also be operated without the App and can be used normally, the operation buttons on the air purifier can be toggled between "Auto, Sleep, High speed decontamination" modes, with the led light to be lit at the side to indicate the current mode.

The air purifier is in the same category of appliance / devices using the Mi Home App to manage and control, they includes the Mi Smart Socket, Yi Ants Web Cam, water purifiers etc.

Other intelligent features of the app includes filter replacement reminder, timer switch, remote switch, run-time exception alerts (blockage), automatic start (automatically turn on when detected the air quality is poor) and the like.

Although the main function is only purifying the air, but the additional app functions make it standout among other air purifiers in its price range.

The air purifier's area of 26 x 26 cm is slightly shorter than an A4 Paper (29.7cm), and 73.5cm in height, a little shorter than a normal desk (76cm). For good purification of air, you will need to keep a distance of 10cm between the back of the purifier and the wall and leaving a distance of 20cm from the side of the purifier and the wall.

Purification design is by a double fan that create internal negative pressure, suction from the bottom of the mesh, and forcing air through the filter from the upper part of the fan.

Official recommended usage area is 28 - 48 square meters, which will meet the needs of ordinary living room to purify the room, but for office space approaching 150 square meters, it will only filter air surround the purifier. Similar to other purifiers using activated carbon, you can smell the unique slight acidity charcoal at the outlet.

The noise produced from the lowest "Sleep" mode, with human ear listen closely nearby, is the "whirring" sound of the wind, a bit like a refrigerator, with a sound value of about 50 dB when measured by meter.

When set to the "Auto" mode, the wind volume and noise level have increased a little, maintained at between 50 - 55 dB respectively.

When set at "High-speed" mode, the volume level will go directly close to 80 dB, and indeed vibrate a bit.

May be taken into account the noise level, the high-speed mode will automatically switched to "Auto" mode after 15 minutes. When keeping at this level, it can easily reach the official target of 406 m³ / h purification efficiency (with official spec of purification 48 m² space required 12 minutes), but having to endure this high speed fan volume. 

Six Differentiating factors for Mi Air Purifier

1) Smart phones to remote control the air purifier

Traditional air purifiers have to control its operations using the buttons located on the device. When we are away from the device, we are completely unable to control the device. After returning home after a hard days' work, we need to switch on the air purifier and wait for a while before we can get rid of the bad air. Or, after leaving the house, we suddenly remember the air purifier is not switch off, apart from the costs of electricity and affecting the mood of the day, there is no way we need to make a special trip home to switch off the air purifier!

Mi air purifier's remote control through the mobile app, complete liberated you from the device, where you can now control and access at any time. Before returning home, you can now switch on and select the rapid purification mode, and arrive home with the air fresh and natural. When away from home, you can switch on or off the device at anytime. Before sleeping at night, you can click the sleep mode through the phone, no longer need to get out of bed to switch modes. Mi air purifier is so simple to remote control.

2) Visual view of indoor air quality visualization

When you feel the air quality in the room is not good, do you know how bad it is? And whether you know whether the air quality outside the window is better than the indoor air quality? Mi air purifier has a built-in high-sensitivity detection module that not only accurately display the total amount of suspended particles in the air, but can present also the value on the mobile phone. Whether you are at home or away, you can now view the air quality anytime and anywhere.

3) Filter replacement reminder

Most people do not know when to replace a new filter. Either replace early, spending unnecessary, or replace it too late, where the filter is no longer effective in purifying the air. Mi air purifier filter replacement reminder is specially designed to automatically send a reminder message through the mobile app, when the filter needs to be replaced.

4) Purifying at fixed time

If you feel a click operation is not smart enough, then you can use the more intelligent feature by using the timing function of the mobile app, where you can schedule the purifying time.You do not need any special attention, just need to follow your habits set the timer in advance, when to switch on and when to switch  off.

5)  Automatic alert on abnormal behaviors and exceptions
If the air purifier encountered anomalies during operation, such as fans jammed with foreign matter, sudden increase of smoke, mi air purifiers report these abnormal situations by sending alert messages through the mobile app. To avoid deterioration of unforeseen circumstances.

6) Reminder to open the windows for ventilation for outside air
While the clean indoor purified air can always be better, but unpolluted outdoor air is closer to nature. The Mi Home app provides air quality data for major Chinese cities from China Meteorological Center. When the outdoor is a blue sky, with better quality than the indoor air, the app will send a reminder asking you to open the windows, walk into into the nature. Of course, do not worry even if the haze come back, the good quality indoor air purification is always waiting for you.

Note : This feature will only work in China, as the Mi Home App only provide air quality data for cities in China.

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