Upon low battery, the smart lock will notify you upon every use of the door via voice command. Finger Print Door Knobs Fingerprint Door Lock, Millionhome Door Lock With App/Code/Backup Door Lock With Code 【USB emergency charging】keyless entry Door Lock It has a low battery alarm function and comes with a USB port for emergency charging. 【3-IN-1 Fingerprint door lock】 Fingerprint +APP Control+ Physical Key, fingerprint recognition rate up to 99% and open the door just need 1 second, you can add 30 groups fingerprints, Eliminate the trouble of forgetting to bring the key when you go out 1 AUTO-LOCK 2 Normal Open Mode 3 Private Mode 1 Left & Right Opening 2 Emergency Power Supply This 3 in 1 smart lock offers three convenient unlocking methods: fingerprint unlock, app unlock and key unlock, meeting people's daily needs in multiple... The ARPHA D258 smart fingerprint door lock offers keyless entry with fingerprint, app, and backup key access. Easy to install, waterproof, and energy-efficient Apollo Smart offers a whole new world of truly keyless convenience to your home. This door lock is very suitable for families, hotels, schools and garages. Connect to the internet with Wi-fi Bridge (Sold Separately)Ultimate Compatibility- designed to accommodate 90% standard "LIFT UP HANDLE TO LOCK" multipoint locking systems. 1 APP Unlock 2 Fingerprint Unlock 3 Key Unlock In the rare circumstance that the batteries die, you can use a 9V battery as emergency power to get into the property! Battery life is dependant on usage and environment, however we recommend changing the batteries every 6 months for optimum performance. Kadonio Smart Fingerprint Door Lock, Keyless Entry
