Is designed to work in Atwood® AC/Gas water heaters that have both a 4 position & 6 position "edge" style or 10 "pin" style connector. The UIB 64 can also be configured for use in older furnaces" water heaters and refrigerators that use a standard igniter board with a 6 position edge or pin style connector by configuring jumpers on the board. This makes the board very handy for mobile service techs. The UIB64 features micro-controlled operation and diagnostic LEDs and is capable to sense the flame through the spark electrode" therefore" eliminates the sense wire. It comes with the mounting hardware and fuse & surge protected 12VDC operations. Size: 3.25" x 4.25"