详细说明
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Features:
Easy Installation, Direly install for knob locks. It is a good choice for the improvement of the old hotels.
Pure stainless steel mechanical rotating structure, enable for using more than 10 years.
Free rotating handle to avoid violent damage when it keeps working state.
Using 4*1.5v standard alkaline batteries.
Unlock ways: Smart card and Magnetic card and Mechanical key.
