Features:100% brand new and high quality.High quality ultra-compact electric lock.Rustproof， durable， safety， convenient to use.Applicable for being installed in the escape doo or fire door electronic controlled system.Adopts the principle of electric magnetism ， when the current through the silicon， the electromagnetic lock will achieve a strong suction which tightly suck the iron， thus lock the door.Instructions:Red wire connects to positive， green wire connects to negative.When it has been connected the wire and the current is available， the electric lock can control door's opening and closing.Specifications:Size: L27mm*W29mm*H18mmLead length: 25mmLocking telescopic length: 10mmPowered form: interruptedUnlock time: 1 secondPackage Included:1pc Electric Lock Assembly Solenoid