smart guard tour system, complete waterproof, 300000 continuous card reading, super durability, 7200 guard tour records WM-5000E2 ... With a simple touch, the WM-5000E2 reader reads touch memory buttons, which are memory chips housed in small, water-resistant, stainless ... 140gOperating Temperature -45° to +85°CStorage Capacity 7200 touch memory button readsBattery 3.0 V Lithium battery, long life ...