Hikvision DS-K4DC105 Automatic Door Closer

Latching speed valve adjustable angle range is 0~15° Closing speed valve adjustable angle range is 15°~180° It is recommended that the door closing speed be slightly faster from 180° to 15°, and slow down from 15° to 0°, subject to the door fully closed. To prevent the door from closing too fast and causing the door leaf to collide with the door frame