Specifications: Measurement Range: 8~16V Power: 12V DC, Max. 0.3A Universal Fit for: Most of cars or motors Note: When the white-pointer stop running, please take out the LED bulb from the rear, and turn the white-pointer around for several times with a thin iron wire, then check it. Product Weight : 76 G / 2.68 Ounces Package Weight : 130 G / 4.59 Ounces Package Dimensions (L*W*H) : 88*76*77 MM / 3.46*2.99*3.03 Inches Package including: 1 * Voltage Gauge 1 * Bolt Pack 1 * Instruction