The usual “Chinese” will say our readers: with the Xiaomi Youpin brand now everything that is white, has a linear design and a light scent of smart is proposed at every turn by the online gadget sites.
Here in reality there is not a lot of Hi-Tech but it is still an intelligent and practical solution that uses the essential basics of wireless transmission and autonomous power generation to respond to the simple need to be announced at the entrance of a room or to act as a reminder for those who have difficulty hearing your voice.
The packaging, the button and the receiver
The white box with inscriptions totally in Chinese (absolutely incomprehensible) has two main components inside: the transmitter and the receiver based on radio frequency technology and with a declared indoor / outdoor port of 50/80 meters.
The two are made of elegant abs and, for once, they are not accompanied by batteries: the receiver in fact connects to any socket using the usual international adapter (it works at 110/220 Volt but the plug is the US one at least in the package we have received) while the transmitter has a friction energy generation system: the generous stroke of the button is used to activate accumulation switches which will be useful for transmitting the signal to the receiver.
The long stroke button that recharges itself 
The receiver does not have a European plug 
the ringtones come out from the speaker placed on the back
The power consumption, being the big button based on a Radio Frequency system with very little data to transmit, are really negligible and manageable by the dynamo system. This has two super positive effects: you don't have to buy batteries, you don't have to replace them and you can place the transmitter anywhere in a protected position (it is not suitable for outdoor installation). For our tests, we placed it on the inside wall of a wall unit in the kitchen.
So you play 
Transmitter and receiver 
The button button
To facilitate the installation of the mega-big button that normally sticks to a smooth surface with its double-sided adhesive, there is also a white disk that we can fix on a rough wall using the supplied caps and screws. Be careful not to mount it on metal doors as the 433 MHz frequencies are heavily shielded.
On the other hand, the receiver is very simple: a disk larger than the transmitter, with a rocker button surrounded by an LED ring that will allow us to customize the sound level (5 steps) and the type of ringtones (36 different) with which the mega-key is pressed on the other side.
Personalization
To change the ringtone, simply insert the receiver in the plug and wait for it to be activated before 3 seconds: by pressing the only button we can “cycle” through the different preset tunes: oriental melodies, western marches and various options, even basic with the sound level that best suits us. pleases. Transmitter and receiver are already paired on the same frequency and you won't have to configure anything.
There is also a Wi-Fi version of the receiver that can be connected with the Mija App but here we are satisfied with the basic performance. The Wi-Fi version costs only 3 Euros more currently and could be interesting for those who want an additional audio signaling system for the Xiaomi ecosystem (for example the rice cooker has finished cooking and the bell rings upstairs where you have the studio …)
At work
As mentioned we have installed the transmitter in the kitchen because one of the purposes of such a system is to avoid screams inside the house to warn that dinner and lunch is ready: we do not have intercoms in every room and warn the children who are studying or listening. headphone music becomes a kind of family festival. With such a bell, among other things, it can be moved to every room of the house with a range that allows you to manage two and even 3 floors depending on the distribution, you have direct communication and, if the room or the other room is in the dark the blue light of the handset has the power to attract attention as much as the low volume ringer.
We have used it at home for a few days and the comfort is absolute thanks to the possibility of installation anywhere in the house. We are also thinking of taking a second package since it is possible to combine more receivers to a transmitter and more transmitters to a receiver by placing the “ringtones” even in the hobby room where the drums (in the sense of drums) and the music do it. as masters.
Conclusions
A gadget that is very simple to install, easy to use and configure even easier to maintain due to the absence of batteries. The very low price makes you forget the need to buy an adapter for the non-European socket.
Pro
Cons
Retail price You can order about 18 euros on GearBest by clicking on this direct link.
The offer is valid while stocks last; for more information on shipping costs and times, any charges and order management, you can consult the seller's website.
