The Level Touch Invisible Smart Lock is an ingenious lock to secure a door. This has the extra advantage that it can be locked and unlocked just by the touch of your hand! In addition to regular keys it also includes a key card. If that weren't enough, you can access it from anywhere using the Android or IOS app!! Wait, in addition open with the touch of your finger!! It was simple to install, also. Easier than our old deadbolt. Terrific improvement over a regular lock. VERY happy!