Eliminate the hassle of house keys with the Plymouth Bright Brass Keypad Electronic Door Knob Featuring Flex Lock. With this electronic door knob, you can control entry to your home more easily and securely, and our Flex-Lock feature allows you to set the lock to automatically re-lock after 5 seconds of inactivity. The LED backlight keypad is able to hold up to 19 different user codes for your convenience, and features a low battery indicator. Also, this electronic keypad runs on a single 9-volt battery, which is included. All in a slim profile and stylish trim that pairs perfectly with interior hardware. The Plymouth trim features an oval shape and straightforward design, and the rich gold tones of Bright Brass help to create an inviting space. Plus, it's been designed and tested with strength and durability in mind.