Sleek beautifully chromed housing. Accurate 0-8000 RPM data every biker needs. Mounts easily in multiple locations and positions. Super bright illuminated for night riding. Choice of black or white analog face. Available for 1 or 1 1/4 handlebars. Compact 2 7/8 D x 3 1/2 L housing. Hardware and easy to follow instructions included. Includes tach adapter for single-fire ignition.