The Smart Door Lock that puts you fully in control giving you the freedom to secure your home without the need for a key. Features and Benefits Control Via Smartphone - Configure, Control and unlock your Smart Door Lock from your smartphone via our secure Bluetooth App. Keyless - Say goodbye to keys, Open your Smart Door lock via your smartphone, Key Card or Key Tag. Simple to Fit - Engineered for easy installation. Connectivity - Compatible with the Yale Smart Home system. (Yale module sold separately) Security as standard - Built in tamper alarm, PAS24 accredited and approved by the Police Secured by Designed scheme. Battery Operated - Powered by 4 AA batteries and a warning when they’re running low. Battery Backup - A 9v battery connection port can be used to power the Smart door lock in the event of flat batteries. Secure Push & Turn Thumbturn. Specifications Dimensions: H 38 W 7.5 D 12.5 cm. Colour: Chrome. Length of Guarantee:2 years. Batteries: AA x 4.