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? Universal for various door opening directions.
? Multiple unlocking ways including linkage, knob, key, etc.
? Automatically locks if the door is not opened within 15 seconds of being unlocked.
? Auto locking after door closing, no door slamming, no noise.
? Low power consumption: Only 1/5 of the power consumption of electric locks.
? Long lifetime of 350,000 cycles.
? Audible alerts for door unlocking and closing.