The RPM10 is a combined tachometer that can measure both contact and non-contact RPM, making it suitable for a wide range of applications. The RPM10 also has an infrared thermometer with a laser pointer for measuring surface temperature from -4 to 600 degrees Fahrenheit (-20 to 315 degrees Celsius), making it perfect for monitoring the operating temperature of motors, bearings, and machinery. Complete with wheels for linear surface speed (0.2 to 6560 ft/min; 0.05 to 1999.9 m/min) or RPM measurements, 4 AA batteries, and a 23-inch length. (0.6 m) of reflective tape, carrying box, and usage instructions.