Specification: Item Type: Electric Door Strike Lock Material: Iron Spray Powder Voltage: 9-12V Installation Method: Right Reverse How to Use: 1. Fasten the lock body, lock head and door buckle shell to the door edge and frame with matching screws. The distance between the tongue surface of the lock body and the tongue surface of the buckle shell is about 5 mm. 2. Observe whether the weight of the door and the door closer (if equipped with a door closer) are ideal. If you find that the door is noisy or does not lock when closing, you can use a No. 12 wrench or pliers to turn the hexagonal screw angle and repeatedly adjust the load spring to When opening and closing the door, the tension is balanced. 3. When the hook and oblique tongue is installed reversely, the inner unlocking can be changed to the outer unlocking, and the installation method is the same. 4. Connect the lead wires at both ends of the lock to an AC/DC power supply of 9-12V, power> 12W, and then press the unlocking control switch. Just press for 1 second, and the lock will automatically open. Package List: 1 x Lock Body 1 x Lock Buckle 1 x Installation Accessories Pack 1 x Lock Head 3 x Keys