Oji Ultra Smart Door Lock with Bluetooth-Oji Ultra is an easy-to-install, maintain and use smart door lock that requires no drilling, no wiring, and no carpentry work. Unlock conveniently via your smartphone, by PIN code, RFID card, or a backup mechanical key. Add a gateway (sold separately) to upgrade to a Wifi Lock. Great for Airbnb and holiday homes. Add the gateway (sold separately) for Remote Key generation and send keys to your visitors and guests from anywhere in the world.