... controller 12v, pure copper transformer back up battery DC12V 7 Ah, LED indication light. Power Supply EA-38, ups function, output ... : 12V DC (11v -14v adj ) Output Current: 3A Output Power: 36W Time Relay: 0-10sec. Output Contact: GND/12V+/NO ... phone system Special Design: double face, PC board , pure copper transformer, steel shellProtect Safely: Short Circuit Protection , charge protection Weight: ...