An external battery pack and connector are included with your mailbox. If your batteries should fail you can use the external battery pack to power up your mailbox in order to open it. As a final fail-safe, there's a hidden lock with high-security round key, to open your mailbox.
Dimensions:
Overall: 12 3/8" wide x 18" high x 21" deep
Outer Door: 10¾" x 7 5/8"
Keypad: 4¼" x 3 7/8"
Mail compartment: 10¾" x 8¼" x 18"
Incoming Mail Slot: 10½" x 2¾"



