This smart lock keypad supports up to 20 unique passwords and includes a key option for unlocking. It features a backlit keyboard, low battery alert, and requires 4 AA batteries for up to one year of use. The price drops from $69.99 to $49.99 to just $29.99 when you apply the code "40I4Y5HJ" during checkout. Shipping is free for Prime members or on orders over $35.