... used for loss prevention security of telecom mobile Unicom, digital city, digital camera counters, GPS counters, MP4 counters, appliances hypermarkets, ... Material: ABS9) Shell Color: bright black , pearl white 3.Function:1) Host Base with Charging Function, Charging monthly ... Contacts disconnection alarm4)Low Voltage Alarm Function :Voltage Less 3.3V Alarm ,remind the charging5)Short Circuit Alarm ...