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 on2. many reference musics3.easy to install4.include one pc 23A, 12V good quality battery5.remote distance range : about 120m6.with digital codes to avoid disturb wireless roment control door bell
[China Manufacturers]