Utilizes the strongest stepper motor on the market for amazing needle response and accuracy Accurate 0-8,000, 0-10,000 or 0-15,000 rpm ranges Large analog face features adjustable back lighting for easy reading Measures 86.5 mm (3.41") at gauge face, 75 mm (2.95") for gauge body. TACH 10,000 BLK/BLK