QSP Tachometer with Recall funtion Range: 0 - 8000 RPM Diameter: 100mm Built in depth: 55mm. Provided with backlight, 12V connection and mounting kit. Semi programmable calibration with 6 dipswitches, featuring Recall funtion (shows you the highest revs you've reached) Works with: ignition signal, generator(dynamo) pulse, digital signal from ECU. Works with 4, 6 and 8 cilinder engines. \"A quality meter, made by the manufacturers of the famous Smiths meters\"