With door close time delay function, will lock until the door completely stop moving, effectively protect the door and lock from damage.Superior low temperature design, safe and durable. The new structure optimization design, more stable and more secure. Ultra-low-power design, more durable and more environmentally friendly. 500,000 times Power locks durability. Made from high-strength aluminum lock body, stainless steel bolt. Operating Modes : NC (close when powered) Fail Safe. Suitable for wooden door, glass door, metal door, fireproof door, etc. Comes with fixing screws and all parts needed to fit as standard application. Lock is an important tool for maintaining families, nursing homes, schools and other places. choosing a good lock is equivalent to choosing safety and confidence. this solenoid valve lock can help you to solve all worries. it is durable and will not be easily damaged. it is convenient to install and is a good choice for you to watch your home. Specification: Item Type: Electric Deadbolt Drop Bolt Lock Operating Mode: NC Fail Safe (close when powered) Feature: Low temperature Voltage: DC 10V -18V Instantaneous current: 850mA Working current: 85mA Time : Time : 0 / 3 / 6 second Colour:Silver Material:Aluminum alloy + stainless steel Size:200mm x 35mm x 40mm Package Contents: 2 x Electric mortise lock 2 x Instruction manual 2 x Installation size sticker 2 x Package of screw 2 x Ordinary fixed board 2 x Magnetic fixing plate Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.