A easy-to-follow instruction would help you to install your intelligent door lock easier. You could adjust the handle as left-side or right-side as your favor. Through APP, you could check the unlocking records, also you can share the temporary code/ekey with visitors, nannies, house keepers, tenants, guests, etc. Semiconductor fingerprint recognition, refuse to copy the prosthesis fingerprint. Emergency battery back-up, this electronic door lock would alarm if it is in low battery, you could temporary charging your lock by power bank or any power source with micro-USB port. Support remote unlock via APP, convenient but safe.