When the battery voltage is lower than 9.5v du the use of the battery, the battery is automatically disconnected. New upgrade power adjustable design, adjustable time for 0-15 seconds. Input Voltage: AC 110V-240V Output Voltage: DC 12V Output Current: 5A Supply Lock Voltage: DC12V, NO, NC Optional Delay Range: 0-15s Power: 50W Size:212mm172mm70mm Material:metal Colour:As shown in color Package Contents: 1 Access control power supply 1 User manual.