Note: There is a tutorial on product images that teaches you how to input and delete fingerprints. Hope buyer friends. Carefully review the pictures. thanks Main Features:  1. Fingerprint Unlock, your fingers unlock everything.  2. IP67 waterproof.  3. 0.2s speed recognition, 360° arbitrary angle recognition, induction rate ≤0.2s  4. Durable structure, zinc alloy and splash proof lock body protects your assets against thieves.  5. Portable, small size and light weight.  6. Family and friend share, up to 10 groups fingerprint can be stored to unlock.  7. Rechargeable lithium battery, no need to buy extra battery.  8. Safe and secure, O11 will remain locked even run out of power.  9. Low Power Alert and quick charge technology.  Wide Applications:  1. Travelling: Suitcase, handbag, travel bag, luggage, laptop, backpack, handbag, and so on.  2. Sports: gym locker, bike, bicycle, golf bags, and so on.  3. Public Areas: student dormitory, school locker, gym locker, employee locker, hospital locker, and so on.  4. Residential: door lock, gate, apartment lock, basement anti-theft security, and so on.  5. Business: office, hospital, fence, and so on.  6. Transportation: garage, toolbox, and so on .  7. Furniture: wardrobes, closet, cabinet, drawers, safes, and so on.     Specifications:  * Fingerprint reader: 96*96 sensor  * Waterproof level: IP56  * FRR：<1%  * FAR：<0.002%  * Material: zinc alloy  * Working voltage: 3.0-4.2V  * Lock weight and Size: 90g  * Lock size: 7.6*4.6*1.3 (CM)  * Fingerprint sensor coverage: 72*64MM  *Unlock speed: within 0.5 second  *working period: a year per power Charge  * Led Light: three color light: red / blue / green  * Battery: 3.7V lithium build in battery  * Working temperature: -10~+40 degrees Celsius  * Fingerprint capacity: record 10 times and save 10 groups       Q & A:  Q1: Why any fingerprint can be unlocked ?    A1: Before entering the fingerprint, any fingerprint can be unlocked. If fingerprints are recorded, only the recorded fingerprints can be used to unlock the lock. Therefore, under normal circumstances, you must record more than two fingerprints to prevent the embarrassing situation of the fingers being scratched and unable to unlock.    Q2: How to do if the fingerprint can't be identified ?   A2: Usually due to fingerprint wear, peeling, scratches, dirty, wet fingers, or fingerprint collection window with smudge and water droplets, fingerprint identification is not successful. It is necessary to ensure that the fingers and fingerprint window are clean and dry .  In case of finger scratches, it is recommended to enter at least 3 fingerprints registration after purchase.    Q3: How many fingerprints can be registered ?   A3: Up to 10 groups of fingerprints can be registered .     Q4: How to do if the battery is dead ?   A4: Connect the charging port with Micro USB, the red light is on, indicating that it is  charging, and it can be unlocked normally during charging. The light is off, indicating that it is fully charged.     Q5: How long does it continue after being fully charged ?   A5: After being fully charged, it can stand by for 12 months, and when the power is low, the red light flashes after unlocking.