... loss prevention security of telecom mobile Unicom, digital city, digital camera counters, GPS counters, MP4 counters, appliances hypermarkets, supermarkets ... 2)Display Charging Function apply to : Mobile Phone , DC camera , Tablet PC3)Disconnection Alarm Function: Three Contacts disconnection alarm4) ... control switch, the host no respnse.1.Check the hidden switch on the bottom if in turned on status; ...