smart lock front door, keyless entry door lock deadbolt, biometric automatic unlock with bluetooth/fingerprint/smart phone app for home/hotel/apartment (black) dowerme yeeuu developed world’s most advanced smart lock access technology and provide you a secure smart lock solution for your family. replacing your traditional keys with keyless entry by code, fingerprint, fob or smart phone app. best of all, all door locks come with 2 physical lock keys, just in case you aren't entirely ready to ditch your door keys. start your smart home from yeeuu and welcome to yeeuu family !