Dimensions: 150 x 90 x 30mm
   With 19 function keys
5 digits LCD call number and showing call-pad work status
Operating temperature: -10 to 60°C
Relative humidity: <90%
Power supply: USB or USB micro adapter

Supports channel 1 to 12 and improve anti-interference ability with security agreement Transmission distance: 200 meters

Contains ten number keys, clear key, recall key, next key, pause key, save key, mode key and valid key

Function: Installed on the counter PC,realize the function of login, call,recall,special call,transfer and etc.