... backup battery 3. 12v 5a output 4. used for access control systems access control 12v 5A uninterruptible power systemsModel: EA-39 Dimensions: ... , adjustable ) Output Current: 3AOutput Power: 36 W Output Contact: Access control, Electric Lock, Release Button, Door PhoneTime Relay: 0~10sec ... Materials, Painted,Protect Safely: Short Circuit protection Suitable For : Access control system,Weight: 3.5kg