Features: 1.High quality use of stepper motors can effectively improve the sensitivity of the tachometer. 2.The numbers and pointer on the dial have a red backlight function for easy reading in the dark. 3.It has the characteristics of low power consumption, long life, high precision and high definition. 4.Easy installation with English users manual. It is strongly recommended that most cars or motors are professionally installed. 5.Using high quality ABS and stainless steel materials, high performance and long service life. Specification: Item Type: Pointer Tachometer Material: ABSandStainless Steel Diameter: Approx. 85mm or 3.35in Voltage: 9-32VDC Waterproof and Dustproof Rating: IP67 Suitable: Car or truck or boat Package List: 1 x Tachometer 1 x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.