Wide measuring range: the RPM meter has a wide measuring range (2.5 to 99999 RPM) and high resolution, capable of measuring at a distance of 2-20in (50-500 mm)) Effectively: our digital tachometer is a highly accurate non-contact digital tachometer with high-speed operation and instant readings Wipe application: the tachometer is suitable for the speed of machines, motors, wheels, lathes used for metal or wood operations Optional measuring mode: non-contact tachometer equipped with automatic and manual measuring modes, both are available, you can choose according to your needs. LCD display screen: digital photo tachometer designed with a large LCD display screen, the readings are displayed on the easy-to-read LCD screen. The description The tachometer is an instrument that can measure revolutions per minute (RPM) in a wide measuring range and high resolution. It has high precision measurement, fast measuring time and a detection distance of up to 500 mm (20 inches), which is suitable for use. Feature Digital tachometer Blue color. Material: ABS. Size: 15x9.5x4 cm / 5.91x3.74x1.57 inch. Measuring range: 2.5-99999 RPM Resolution: 0.1RPM to 2.5~999.9RPM; Accuracy: Plusmn; 0.02% + 1 number Measuring distance: 50~500mm / 2~20in Sampling time: 0.5S (above 120rpm) Data storage capacity: 60 readings Auto-off: after 20 seconds Working temperature: 0 to 50c (32 to 122F) Working humidity: 10 to 90% RH Storage temperature: -10 to 60c (14 to 140f) Storage humidity: 10 to 75% RH Power supply: 1 * 9V 6F22 Battery (not included) Notes: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package including 1 * Tachometer digital