1,RFID Attendance management system 2,Waterproof &Durable 3,USB Communication 4,10 ... 3.6V lithium battery,rechargeable5,Light and buzzer to show success read, also can light and vibration.( optional in ... 000 recordingsCommunicationUSB Battery3.6V Lithium battery,rechargeablePrompt ModeLight&Vibration/Light&BuzzerDimension147*35*30mmWeight:165gRFID Checkpoint ModeEMIDPhysicalElectronic chip sealed in ...