Includes a compact two terminal (non-grounding) socket assembly, high brightness 12 volt bulb, colored lens and instructions. Mounts in an 11/16 inch hole and requires 1.5 inch clearance behind the mounting panel. Wire and triggering switch are not included. Note: This is a compact unit for crowded instrument panels where space is at a premium. If you want a larger indicator, consider the Auto Meter Pro-Lite, Part No. AM3240.