Kwikset 912 Z-Wave SmartCode Electronic Touchpad with Tustin Lever, Satin Nickel, featuring SmartKey, Works with Alexa via SmartThings, Wink, or Iris Works with Alexa for voice control (hub required, Alexa device and hub sold separately). Designer style and superior security with this Kwikset Signature Series product For use on exterior doors where keyed entry and security is needed Featuring SmartKey re-key technology; re-key the lock yourself in seconds in 3 easy steps Keyed lever operated by key outside or electronic keypad and thumb turn inside Z Wave certification number:ZC08-15060008. Please refer the Instrctional Video from the Image Section before use which is highly essential. Features an adjustable latch to fit all standard door preparations, Z Wave certification number:ZC08-15060008 Refer user guide and user manual below