The lock body parts are treated with multi-layer nickel electroplating,the surface is smooth and smooth without burrs,and the rust resistance is good. The response speed of the electromagnetic lock is less than 1S,and the action is smooth The feedback signal is a short-circuit switch signal.When the lock is on,the signal line is in a conducting state.When unlocking,the signal line is disconnected.The working state of the electromagnetic lock can be observed through the feedback signal. The lock tongue is made of solid high-quality sticker material,and the action is smooth. We’re Here for You：Thank you for your trust. If you have any questions, please message us through Amazon — we’ll be glad to assist., Manufacturer: DONGKER