Electric programmable tachometer with modern design makes it widely used in various fields Features: 1) Dia.: 85mm face: black, other types are of white or customized color2) Voltage: 12V, other types: 24V, or 12V/24V optional 3) Back lighted LED illumination, the graphics and scales are black with illumination off, and glowing blue with illumination on.4) Scales: 0-4000rpm5) LCD hourmeter ...