1st Generation August Smart Lock - Silver Discontinued by manufacturer Secure - Safe, keyless access to your home with iOS and Android smartphones Easy DIY Retrofit Install, - Replace the interior of your existing deadbolt; outside is unchanged Total Control - You control who has access to your home and manage how long their access lasts Always On - Powered by batteries means it's always on, even if your power, Wi-Fi, or cable go down Kindly refer the installation videos, August Smart Lock works with the free August app to create keys, grant access, view the activity log, and more, available for Android(TM) and iOS.