The Philips retrofit lock can be easily installed on the inside of your door. The wireless keypad provides pin code and/or fingerprints access, while also allowing your existing keys to keep working. With built-in Wi-Fi you can check your lock status and control it anywhere, anytime. Works with the Philips Home Access App to share access with friends, family members or anyone you want anywhere and anytime. Know who is coming and leaving with instant notifications.