IP66 Protection Level :The fingerprint lock has an IP66 protection level, making it dust-tight and to withstand being submerged in water up to 1.5 meters deep for 30 minutes. Rechargeable Battery :The fingerprint lock comes with a built-in rechargeable battery, eliminating the need for frequent battery replacements and making it more convenient to use. Biometric Doorknob Function :The fingerprint lock has a biometric doorknob function, allowing for easy and secure access to your home or office. Emergency Use :The fingerprint lock can be used for emergency purposes, providing quick and easy access to your home or office in case of an emergency. Tuya APP, tracable record of unlock users. Electronic Key : all fingerprints verificaiton failed to unlock the padlock, or you need ask someone else to open the padlock , the electronic key can be inserted into USB,any fingerprint can unlock the padlock Service Life After Fully : 2,200 times Low-Battery Alert Security Protection charging time : 70mins Colour:Black Material:plastic+metal Package Contents: 1 x Portable Fingerprints Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.