Feature: 1. (0 ‑ 9.99 )x1000 RPM tachometer gauge, can be used 12V car with 4/6/8 cylinder. 2. Red and blue light colors are available, you can try different wiring methods to get the correct color. 3. High accuracy and sensitivity, easy operation, which is stable and dependable to use. 4. Made of premium plastic and aluminum alloy materials, sturdy, anti-corrosion and durable. 5. The gauge light is blue when the headlights are on at night, and it is red when the headlights are off during the day. Specification: Item Type: Automotive LCD Digital Tachometer Material: Plastic Tachometer Gauge: (0-9.99 )x1000 RPM ( No Sensor ). Just 12V car 4 / 6 / 8 Cylinder. Fitment: Universal fit -Benz, fit , fit , fit , fit GM, fit , fit , fit , fit etc. Wiring Instructions: Red -- 12V accessory Power Black -- Ground negative White / Orange( Amber ) -- Engine accessory power White / Orange( Amber ) -- Headlight switch (12V switch power) Green -- Boost sensor (connect to green wire from sensor) Example: Red -- 12V accessory Power Black -- Ground negative Orange ( Amber ) -- Engine accessory power White -- Headlight switch (12V switch power) Green -- Boost sensor (connect to green wire from sensor) Easy installation with users manual in English, professional installation is highly recommended. Package List: 1 x Tachometer 1 x Manual