... on the surface makes it super durable. One 3V lithium battery can read buttons 350 000 times continuously. If you ... simple touch, the WM-5000E2 reader reads touch memory buttons, which are memory chips housed in small, water-resistant, stainless steel ... 45° to +85°CStorage Capacity 7200 touch memory button readsBattery 3.0 V Lithium battery, long life spanBattery life 350 000 continuous ...