Security as standard. Feeling safe and secure is a must for any homeowner. The Keyless Lock has a tamper alarm and incorrect pin code feature. There's also no need to worry if the electricity goes down as the Keyless Lock is powered by 4 x AA batteries. It will even warn you when the batteries are low. 9V battery backup. In the event of the AA batteries failing there is a further fail safe, thanks to a 9V battery connection override. What's more, when connected to a smart home system, Yale’s Keyless Connected allows you to unlock your door from anywhere in the world. Easy Installation Suitable for wooden doors with a 60mm nightlatch. (Nightlatch not included). One touch control Unlock your door with a key tag or key card with a simple tap Enhanced encryption Enhanced security to protect against unauthorised access.