Features - Color: As shown - Product Material: ABS - Size: 11x8.7x9cm - Measurement range:30 IN.HG-30 PSI - Product voltage: 12V - Unit conversion of pressure value: 1mpa = 300in-hg = 145psi - Diameter: 52mm - Wiring installation mode: yellow power supply is positive and the black power supply is negative. - Further upgrade machine core, the pressure measurement is more accurate and faster. - Easy to install, simple wiring and non-destructive installation. - Beautiful appearance, circular polishing outer ring, colorful LED LCD display, pleased to eyes. - 12V general type charging table, applicable to most models. - Clear Dial display and numerical accuracy, temperature range can reach to 30 IN. Hg and 30 PSI. - Warm Tip: Dear buyer, Due to lighting effect,monitor& 39;s brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand