1.MINI tiny receiver (NARO,receiver size: 19*15*6mm)             
2.2.4G wireless,effective distance 10-15 meters. 
3.bettert:1×5#         
4.size:101*59*33        
5.weight:0.06KG   
6.alarm with low voltage
7.button live:5 million click(4 buttons)
8.e-mail:deandeng#ty-tech.net