Wireless calling system restaurant table buzzer system bell call button buzzer one button for restaurant tables

Wireless Transmitter

1.Wireless coding: 1527  
2.Operating voltage: DC12V (battery 23A12V);
3.Operating current: 15±3mA;
4.Range: 500m (open aera);
5.Operating frequency: 433MHz;
6.Used as calling button or emergency button, waterproof;  
7.Size:159 x 30 mm
8.Color options: Wine red / black