Halo Wi-Fi Smart Lock is a keyless entry electronic deadbolt featuring SmartKey. Using the Kwikset App, you can lock/unlock, program up to 250 user access codes, and receive notifications from anywhere there's an Internet connection. This single cylinder deadbolt can be locked or unlocked by using the keypad or key from the outside as well as the turn button from the inside. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel.