Features:
Adjustable 7 LED Colors shift light on face.
For 4/6/8 Cylinder Gasoline Cars.
Easy install, durable,shockproof.
High accuracy and easy operation.
Wiring:
Black - Negative
Red - Positive
Green - Speed si-gnal
You can press the Bu-tton of the dial, and the gauge will light.

Specifications:
Color: Carbon Fiber
Input Voltage: 12V
Diameter: 3.75" (95mm)
Cable Length: Around 55cm
Reads: 0~8000 RPM
Package Size: 14 * 14 * 14cm / 5.5 * 5.5 * 5.5in
Weight: 379.5g / 13oz

Package List:
1 * 3.75" Tachometer Gauge
1 * Installation Instruction
1 * Package of fitting

Note:
NOT suitable for diesel vehicles, Only for 12V petrol vehicles.