Bulldog Pedestrian Gate Lock for Gate Opener Bulldog Pedestrian or Walk Through Gate Lock (FM145) Designed for horizontal use on Walk Through or Pedestrian Gates. The Bulldog is an affordable solution for protecting swimming pool areas, playgrounds, tennis courts, boat docks, etc., from unwanted access. Included in Kit – Digital 25 CODE Keypad for outside of property, push button control (RB101) for the inside of property, Lock Receiver and (4 AA rechargeable Batteries not included) for use in the Keypad. • One year* of operation with 4 x AA alkaline batteries (no transformer or solar panel is required)• Accepts either standard alkaline or rechargeable batteries• Built-in charger circuit for rechargeable batteries (must use with transformer or solar panel)• Accepts door bell push button for easy exit from inside property• Up to 25 programmable entry codes (permanent and temporary codes)• Temporary codes can be programmed to automatically expire (1 to 7 days)• Daylight sensor that automatically turns on backlight when button is pressed in low light conditions• Automatically disables the unit after 20 key presses for 40 seconds to discourage unauthorized entry• Programmable lock-hold time from 1-9 seconds (default at 3 seconds) Note: Longer lock hold time will reduce battery life when using alkaline batteries