... rfid guard tour system 2,Waterproof &Durable 3,USB Communication 4,10 meters free fall without damage 5 ... records3,USB Communication:no need to install USB driver,high speed data download.4,Power:3.6V lithium battery,rechargeable5 ... .Storage Capacity16M,60,000 recordingsCommunicationUSB Battery3.6V Lithium battery,rechargeablePrompt ModeLight&Vibration/Light&BuzzerDimension147*35*30mmWeight:165gRFID ...