HIKVISION DS-K4T108 Value Series Bolt Electric LockDS K4T108 electric bolt is designed for wooden door, glass door, and metal door with the opening angle of 180. It can be used for controlling door opening closing. It supports signal output of lock output status testing. MAIN FEATURES Auto Locking if the induction module is detected Suitable for wooden door, glass door, and metal door Equipped with internal voltage dependent resistor (MOV) Signal output of door lock status (NO\NC\COM)) Abrasion proof