Smatrul Self-Powered Wireless Model Doorbell - BLACK (2 Button / 2 Receiver)60 Music Selection The doorbell has 60 melodies for you to choose from, and the doorbell volume has 4 adjustable levels, namely "Large, Medium, Small, Silent" levels, from 0dB to 110dB. The pleasant sound of the wireless doorbell can spread throughout the house and walls, and can be heard anywhere in the house to notify you that a guest has arrived. Battery free transmitter The transmitter of this wireless doorbell does not require the installation of

【60 Music Selection】

The doorbell has 60 melodies for you to choose from, and the doorbell volume has 4 adjustable levels, namely "Large, Medium, Small, Silent" levels, from 0dB to 110dB. The pleasant sound of the wireless doorbell can spread throughout the house and walls, and can be heard anywhere in the house to notify you that a guest has arrived.

【Battery-free transmitter】

The transmitter of this wireless doorbell does not require the installation of batteries. The principle is to drive the wireless signal by pressing and generating electricity. It is waterproof, does not require batteries, and is green and environmentally friendly. You no longer have to worry about replacing batteries. (Only supported by Model B)

【LED indicator】

When the transmitter is pressed, and a signal is received, the blue LED indicator on the receiver flashes. This function is also helpful for people with severe hearing loss.

【Suitable for multiple scenarios and diverse groups of people】

This home wireless doorbell uses RF433 high-frequency electronic technology, which has strong anti-interference ability, ensuring that multiple groups of devices can work separately without crosstalk. This wireless doorbell is ideal for classrooms, offices, hospitals, restaurants, and factories. In addition to the doorbell function, this wireless doorbell can also be used as a night light or a pager for the elderly, making it a versatile device suitable for any environment.

【Easy to install and use】

This wireless doorbell does not require a WiFi connection or wires; just stick the doorbell wireless button on the door and plug the receiver into the socket. Please note that although this doorbell wireless button can be installed on nearby walls, it is not recommended to install it on metal doors.

--Transmitter installation method:

1. Double-sided sticker

Use one side of the double-sided sticker to stick to the bottom of the transmitter, and the other side to stick to the place to be installed (it is not recommended to install on iron doors, which will affect signal transmission)

2. Screw installation

First, determine the installation location, then use professional tools to drill holes in the wall and install rubber plugs, fix the bottom cover to the wall with screws, and then push the transmitter along the slide rail to lock it in place. (Please refer to the manual for specific steps)

Technical parameters:

--Power supply: self-generated (no battery required for Type B). CR203 (Type A)

--Power consumption: 0.25W

--Music: 60pcs

--Ringtone volume: maximum 110db

--Weight: 120g

--Signal transmission distance: greater than 150 meters (open area)

--RF frequency: 433MHZ

--Operating temperature: -20℃~60℃

Plug: EU PLUG