*100% wireless configuration,installation by DIY;
*1,000,000 inlet RF pin sets maintains high reliability;   
*Simple accessory expansion by automatic recoding;      
*Can work with 99 wirelss calling remote controls or 10 wireless alarm remote controls;                                                                                       *Digital voice message record, auto play after receive calling;                  *Built-in digit clock;                                                                                             *Display the latest 10 calling numbers, calling times or alarming zones