Feature 1Lock when energized, unlock when power fails. 2Super tension, built-in surge absbing circuit. 3Fine wkmanship design, no mechanical wear long service life. 4Made of aluminium alloy, sturdy safety in use. 5Professional electromagnetic lock, stable reliable perfmance, warranty period of two years.Features: Lock when energized, unlock when power fails. Super tension, built-in surge absbing circuit. Fine wkmanship design, no mechanical wear long service life. Made of aluminium alloy, sturdy safety in use. Professional electromagnetic lock, stable reliable perfmance, warranty period of two years. Suitable f wooden dos, glass dos, metal dos, fire dos. Specifications: Material: aluminum alloy Lock pull: 60kg linear pull Input voltage: DC24V Wking current: 3A-5A Package Weight: 539g/19.0oz Package List:1 x Lock1 x Iron Block1 x Bag of Screw1 x User ManualNote:Insufficient suction, one is whether the input voltage is enough to 24V, the other is whether the installation is crect, mainly to see whether the iron plate is installed very hard, the installation requires the iron plate to be able to shake left right, cannot be fixed, otherwise it will not wk well with the magnet If you touch it, if you don't touch it, the suction will be insufficient.Please note that the new type old type of this product will be sent romly, make sure you will not mind befe dering. { font-family:'Arial' imptant; } table { bder-top: 1px solid 000; bder-left: 1px solid 000; } table td, table th { bder-bottom: 1px solid 000; bder-right: 1px solid 000; padding: 3px 5px; } table th { text-align: center; }