Remote Control Door Chime Set

This Wireless Digital Door Bell System features DIY convenient installation. DIY design makes you not need to seek help from professionals, and you don't need to set the line or to excavate a hole. You can install it anywhere you like according to your apartment. With sounds adjustment and more than 150M super long operating range, this Doorbell will be a good choice of knowing the arrival of your friends.
Specifications
Transmission Distance (Maximum) > 150 meters
Battery for receiver 2×1.5V AA battery (NOT include)
Battery for doorbell button 1×12v 23A battery (include)
Size for Receiver 9.5L x 6.5W x 3H cm
Size for doorbell button 8.5L x 8.5W x 3H cm
N.W. 220g
Package Size 20.5L x 16W x 3.5H cm