popular used in hallyway, enterprise, hotel,home, supermarket and warehouse and so on

1. widely used in hallway, enterprise, hotel, home, supermarket, warehouse and so on

2. many reference musics

3.easy to install

4.include one pc 23A, 12V good quality battery

5.remote distance range : about 120m

6.with digital codes to avoid disturb

wireless roment control door bell