Secure smart lock for your front door; replaces the deadbolt lock you already have. Keyless entry on the LED keypad so you can lock and unlock your front door without a key; keypad chimes play sounds to confirm responses, such as locking, unlocking, or turning Privacy Mode on or off. Give unique passcode to family and guests and set a schedule to control when they work; when you don’t want to be disturbed, Privacy Mode disables the keypad so it can’t be unlocked with a passcode. Get alerts when someone locks or unlocks the door or tries to tamper with your smart door lock. 4.59 x 2.59 x 0.8 inches.