Witop Host for wireless calling system1.different requesters can be distinguished with  different prompt music (12 pieces of beautiful prompt music)2.auto restoration of the display screen and the calling numbers can be deleted automatically.3 display windows to show one group two-digit numbers

4.super signal receiving distance    

Technical Specifications:Power: AC220V/50HZ-DC12V/1AReceiving Sensitivity:-144dbm  Frequency: 433MhzCapability: Can work with 180 pcs 1-key call buttonPanel display: Number or Lettersize(247*159*37mm)