ExpiredFUVNUAL Doorbell Wireless Doorbell Waterproof Door Bell Ringer kit with 1 Transmitter and 2 Plugin Receivers 55 Melodies

Product Features:
Durable waterproof transmitter
The IP55 dustproof and waterproof rating makes the transmitter strong enough to withstand various outdoor environments. In addition, the transmitter has an operating temperature range of -30°C to +70°C, and it can work even in the harshest weather conditions.

All kinds of sweet bells
The wide selection of 55 melodies allows you to easily choose the melody that suits your preferences. You will never be bored with the doorbell anymore! Use the "Next" and "Previous" buttons to easily and simply select the melody you like.

Long distance operation
The doorbell supports a wide range of 150m-300m (depending on the operating environment). Please rest assured that with the help of the doorbell, you will not miss any important guests or emergencies.
Innovative memory function
Every time you turn on the device after a power failure, it will still maintain the melody and volume level you set last time. This makes it not only very convenient but also very user-friendly.

Parameter:
Working temperature: -30°C to +70°C
Working frequency: 433.92MHz±280KHz
Receiver voltage: 110-260V/50-60Hz (wide voltage)
Transmitter battery: 1 12V23A hour power battery
Quality certification: CE, ROHS, FCC, PSE, TELEC

You can get:
Transmitter 
Receiver x2
User Manual
Double Sided Tape 
MiniScrew Driver 
USB Cable (USB doorbell only) 

Precautions
1. The transmitter cannot be installed on a metal door, it will weaken the signal distance.
2. Keep the receiver away from electrical appliances with large electromagnetic field radiation (TV, computer, audio, etc.)
3. The actual receiving distance of the signal will be affected by the use of environmental factors.