100% Waterproof.

 Wireless and very easy to install system.

 2 key Functions: Call, Bill, Drink, Cancel.

 Strong Signal strength upto 100 mts.

 23A-12V battery ensures long life.

 Working voltage: DC12V

 Working current: 10mA

 Use Frequency: 433.92mhz

 Size Dimensions : 60*60*22mm.