... Smart RFID Guard Tour System. 2. Completely Waterproof and drop-resist. 3. Low power consumption. 4. Auto-inductive ... IDPhysicalElectronic chip sealed in PVC case, water-proof and shock-resistDimensionOptionalWeightOptionalFrequency125KhzStorage Temperature-30°C ~ 80°CData ... * Residential,office building, hospital, hotel, school, factory patrol and guard etc* Post, police, oil field, gas pipe, ...