Table service call button can send the calling signal to a receiver, call waiter when need help.
With 12V 23A battery,
Round shape,
belongs to wireless calling system.
OEM acceptable
1.remote waiter call system button accept OEM
2.wireless restaurant waiter call system bell material: PC with Smooth surface and waterproof silicone
3.restaurant table caller button K-X2 100% waterproof and Ultra-thin