MingChuan Wireless Doorbell for Home with 55 Melodies Clear Music and High Decibels Operating at over 900-feet Range 5 Level Volumey and LED Flash Item NO.: F25815/F25816

Wireless Doorbell, 5 Levels Of Adjustable Volume From 0db To 100db 
55 Chimes To Choose: Press One or The Previous Button to Easily Select 55 Melodies 
Use a Speaker to Make The Doorbell Output Clear And High-Decibel 
Radio Operating Range: Operating Range of Over 980 Feet(300 Meters). Ensures You Can Hear The Bell and Answer The Door 
IP55 Waterproof. Easy Install, With 3M Double-Sided Tape 
Specification: 
Wireless remote control distance: 300 meters (empty barrier-free zone) 
Volume level: 5 levels adjustable, 0-100 decibels, including only the light is not loud and silent mode 
Encoding: Learning code, DIY 
Transmitter with waterproof rating: IP55 
Working frequency:433.92MHz±280KHz 
Operating temperature: -30°C~+70°C 
Transmitter size:3.2*2*7.3cm 
Receiver size: 8.2*8.2*5.5cm 
Transmitter weight: 32g 
Receiver weight:85g 
Receiver voltage: 110-260V / 50-60Hz 
Matching combination: One for one (1 transmitter with 1 receiver) 

Packing list: 
Transmitter, receiver, double-sided tape, battery, small screwdriver, manual