... (reader, exit button, intercom); Lock Size: L340*W41.4*H20.5MM;Holding Force: 180 kgs*2(350LBS)*2;Voltage: DC12V /DC24V ( ... optional);Current Draw: 12V/300mA*2; 24V/150mA*2Suitable for: Wooden door, Glass door, Metal door, fireproof ... ,maintenance forever, change within 3 months because of product quality itself 180kgs double door magnetic lock with signal output