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1. Pure stainless steel mechanical rational structure enables its life to be more than 10 years. | 
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2. It is very easy to change batteries in the lock,just need several minutes on one lock. | 
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3. Using 4 x 1.5V standard alkaline batteries. | 
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4. Unlock ways: 
Fingerprint or 
Keypad or 
Mechanical key . | 
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5. The fired users can be deleted individually without any effect on the application of the other users. | 
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6. If the 
fingerprint is not input correctly. The handle is free, it can protect the door against opening by fore,and prolong the using of the mechanism of the 
lock . | 
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7. 
Fingerprint user capacity 150 and password capacity 78. | 
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8. especialy suitable for installation by non-professionals. |