1、Anti-magnetic off function, unlock without magnetic, locked without external interference, high security, prevent man-made damage. 2、The delay time can be adjusted freely through the switch. Three levels are optional: 0-3-6 seconds. 3、Low power consumption, moderate starting current, energy saving and environmental protection. 4、Zinc alloy shell, it has better anti - interference performance, firm and durable. 5、Simple installation, no complicated tools required, convenient to use. 1 x Electric Bolt Lock2 x Sheet Metal Guard1 x Screw Pack1 x Instruction Condition: 100% Brand NewItem Type: Electric Bolt LockMaterial: Zinc AlloyColor: As picture shownWorking Voltage: DC12VDynamic Current: 900mAStatic Current: 90mAOperating Environment Temperature: 0-50℃Coil Type: Continuous Operation TypeDelay Function: Delay time can be adjusted 0-3-6 secondsSurface Temperature: Below Ambient Temperature +15℃Wiring Instructions: Red wire connect to DC12V, Black wire connect to GND