This is the same gauge used in VIAIR's onboard air hookup kits. Utilizing a well-designed, high quality 200 PSI pressure monitor with built-in ON/OFF switch to activate or deactivate compressors as needed, this gauge kit is perfect for those who already have an onboard air setup.Included Parts:(1) Illuminated Dash Panel Gauge(1) 20 Ft. Lead Wire with Inline Fuse (30 & 40 amp included)(1) 1/8” (F) NPT Compression Fitting(3) Insulated Female Terminal Connectors(2) Insulated Male Terminal Connectors(2) Quick Splice Connectors(3) Ring Terminals(6) Cable Ties(3) Cable Tie Brackets(1) Continuous Grommet(2) Mounting Screws, Washers, Nuts(1) Instruction Manual