Note:the Pointer will not on the Zero when you receive ,it is normal, after connect to the car , the gauge will be work well.Package Include (As Picture Show )Package 1:1X Tachometer1X Install Manual1X Gauge HolderPackage 2:1X Tachometer1X Install ManualPackage 3:1X Gauge HolderRange:Boost gauge psi: -30-30in.HgBoost gauge bar: -1-2BarVacuum gauge: -30-0in.HgWater temp gauge: 40-120Oil temp gauge: 50-150Oil press gauge: 0-100PsiVolts meter: 8-16VTachometer RPM: 0-8000RPMFeature:1. White Digital LED Readout.2. Easy install,comes with installation instructions3. Electronic Gauge has the Opening Sweep Movement.Fitment:Only Fit for 12Volts gasoline Car(Tachometer only fit 4/6/8 Cylinder)Instruction:1. Easy Installation With Users Manual In English2. Comes with Mounting and Installation hardware.3. Professional Installation is Highly Recommended.4. Add a racing look and feel to your ride,High quality and light weigh.