Shindy 17-863 Digital Tachometer This compact size tachometer indicates up to 19,990 rpm Universal to both 2 and 4 strokes, and single to 8 cylinders It memorized the highest rpm, and has a clock function The body size is length: 76mm, weight: 36mm and height: 16mm; the window size is 34mm x 15mm Not fit to point ignition systems