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A. Compact and beautiful, can be hidden and installed into the thindoor body.
B. Ultra-quiet operation, noise decibel 55dB orless.
C.Aluminium alloy shell + stainless steel panel, anti-corrosion and rustprevention,beautiful and practical.
D. Quickly open the door, can be adjusted according to the differentoccasions ofthe door closingspeed of3-7 seconds.
E.Adjustment of the flexible speed, angle, torque, anti-clamping forcecan be easily adjusted to applyto a varietyofoccasions.
F. Can be used with a variety of access control F. Can be used withvarious kinds of access control, switch button, remote control switch,infrared switch, mobile phone remote control, fire signal input, etc.can be connected to use.link:https://www.heinda-cn.com/floor-spring/concealed-floor-spring/concealed-automatic-door-opener.html