Key Features . Configure Control and unlock your Smart Lock from your smartphone via the secure Bluetooth App.Say goodbye to keys Open your Smart Door lock via your smartphone Key Card or Key Tag.Engineered for easy installation.Compatible with the Yale Smart Home system. (Yale module sold separately)Built in tamper alarm PAS24 accredited and approved by the Police Secured by Designed scheme.Powered by 4 AA batteries and a warning when they\'re running low.A 9v battery connection port can be used to power the Smart door lock in the event of flat batteries.Secure Push and; Turn Thumbturn2 Year Guarantee   Say Goodbye to Keys With Conexis L1 your smartphone is now your key. There\'s no need to leave keys under the mat or worry about the hassle of replacing them if they go missing. Stay in Control Send mobile keys to family and friends. Choose to give access for a few weeks or hours - It\'s up to you. You can even revoke mobile keys key cards key tags and phone tags in an instant. Know Who Comes and Goes Have peace of mind knowing your loved ones are home safely. When using mobile keys you can receive a notification informing you they are home. The Yale Lock . .