If your vehicle is supercharged or turbocharged then this gauge is simply a must have. For peak performance you need to know how much boost you are making at maximum RPM's. Now you can accurately monitor your boost as you modify your ride! Save your turbo- Set the warning feature to alert you before you overboost. Fully programmable to any level you want. Make changes within seconds using the buttons on the front of the gauge. Features: Whisper quiet and lighting fast Japanese Stepper Motor Movement Analog and digital display Pointer trailing LED's Fully programmable Warning feature Daisy chain Premium waterproof sender Includes wire harness (gauge to sender -plug and play) 2 color choices Mounting base Visor Free tech support This Electric Boost Gauge will perform a digital sweep, on Start-up. (-30vac to 40 PSI includes Mounting cup, Silicone Tubing Kit, T-Adaptor, Waterproof Electrical sender, Plug and play wiring harness with waterproof connector, Instructions and decal)