1,Excellent rfid guard tour system 2,Waterproof &Durable 3,USB Communication 4,10 meters free fall without damage 5 years warranty,one year free exchange for quality!HUA-101 Excellent rfid guard tour system1,Completely water-proof and shock-resist,built-in silicone layer,super imported aeronautical aluminum body , premium military grade hard anodized coat,10 meters free fall without damage. ...