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Fingerprint and keypad Lock #6600-98 1. Pure stainless steel mechanical rational structure enables its life to be more than 10 years. 2. It is very easy to change batteries in the lock, just need several minutes on one lock. 3. Using 4 x 1.5V standard alkaline batteries. 4. Unlock ways: Fingerprint or Keypad or Mechanical key. 5. The fired users can be deleted individually without any effect on the application of the other users. 6. If the fingerprint is not input correctly, the handle is free. It can protect the door against opening by force, and prolong the using of the mechanism of the lock. 7. Fingerprint user capacity 150 and password capacity 78. 8. Especially suitable for installation by non-professionals. 9. Use 9V extra power when power is off, which is safe and convenient. 10. There are three colors for your selection: Stain Chrome, Bronze, PVD Gold