1,Excellent rfid guard tour system 2,Waterproof &Durable 3,USB Communication 4,10 ... one year free exchange for qualityHUA-101 Excellent rfid guard tour system1,Completely water-proof and shock-resist,built- ... Checkpoint ModeEMIDPhysicalElectronic chip sealed in the PVC case,waterproof ad shock-resist,easy to install,durable, ... Goods issue, Inventory, Asset tracking etc... Excellent rfid guard tour system