1,Excellent rfid guard tour system 2,Waterproof &Durable 3,USB Communication 4 ... free fall without damage.Suitable used in harsh environment.2,Storage:60,000 records3,USB Communication:no ... free fall without damage.Suitable used in harsh environment.Storage Capacity16M,60,000 recordingsCommunicationUSB Battery3.6V Lithium ... Inventory, Asset tracking etc... Competitive rfid guard tour control system