Description: BF series tachometers are electronic blacked out gauges which feature high response and refined design. When the car is off they display a flat black face. As soon as the car is turned on, the gauges light up and are in full affect. This tachometer is 80mm in diameter with white back lighting and an 11000RPM range. Features:-Brightness adjustment: 11 stages of brightness, 5 stages in the daytime and 6 stages at night. Wide-angle scale is used at the idling range 0~3,000RPM. The scale is fitted to recent engine power band and linear scale is used from 3,000RPM to 11,000RPM. The scale is compressed to acquire great visibility and ease of use.-Dual warnings of light and buzzer-Two customer- defined warning RPMs can be set. When the RPMs are exceeded, the warning LED blinksghts up and the warning buzzer sounds.-The exclusive large- sized indicator which lights in green and red enhances the visibility of warnings in addition to the warning LED in the gauge. Peak memory function- Detachable switch unit- The gauge is clinched by using the exclusive mounting band and back case. Wires can be stored in the back case neatly. By having the Defi rev adapter built-in, the tachometer works on vehicles with DIS (Distributor-less Ignition System) Regular Position Bezel for 80mm (3 1/8") gauge is included in the product.