Trail Tech 72-A00 Silver Digital Tach/Hour Meter Smallest meter available (1.9 inch x1 inch x.59 inch ) with large, easy to read display Easily mount it to any surface using either the bolt-on or peel-n-stick mounting options Waterproof for all riding conditions Measures tach up to 20,000 RPM in real time Tracks total hours on motor for easy maintenance recording