YD-601 Basic Wall Mount Door Holder 1)Dimensions: 80Lx80Wx40H(mm) 2)Holding Force: 70kg(150Lbs) 3)Voltage: 12/24VDC+10% 4)Current Draw: 12V/100mA 24V/50mA 5)Suitable for: All Kind of the Single & Double Smokeproof Door 6)Surface Temp: ≤+20 7)Operating Temp: 10+55(14-131F) 8)Suitable Humidity:0 90%(non-comdensing) 9)Finishes for Shell: High Temperature Paint and Environmental Protection Zinc 10)Finishes for Armature: Zinc 11)Weight: 0.82kg Standard Packing: 20pcs.