1Door suction is a supporting products of fire door system, which is a fire door control device. 2With a manual release button, easy to operate, convenient for using. 3Suction of about 500N, strong stability, release without residual magnetic while power failure. 4Normally keep the fire door open by power supply; release the fire door by controlled power failure during fire; the fire door will be closed under the action of the door closing device. 5Pure electromagnetic principle, simple structure, firm and durable, not easy to be damaged. 6Floor mount, easy to install, no need complicated tools, save time and effort.Condition: Item Type: Fire Door Holder Material: Zinc Alloy Color: As picture shown Suction Force: 500N Working Current: 160mA/80mA Surface Treatment: Electroplating Suitable For: All Kinds of Single/Double Door Fire Doors Installation: Floor Installation Working Mode: Normally keep the fire door open by power supply; release the fire door by controlled power failure during fire; the fire door will be closed under the action of the door closing device 1 x Door Suction1 x Accessory1 x Screw PackIt cannot connect to 220 or 110V.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.