Detailed Product Description Hotel sauna lock,unlock by bangle card 1.Function:(1).Unlock by ID/IC card,password.(2).2 class of ... function:press sub-lockpin for 3 seconds,then the lock will be close.(6).Used in sauna,cabinet,mailbox,meter box,cupboard ... ,lockfast,etc.(7).Low power alarm:when voltage≤3V,lock will send alarm.2.Parameter(1).Power supply:4pcs 1.5v ...