Features: *This motor tachometer has a large LCD display value that is easy to read. *Wide measuring range, high resolution and reliable use. *The non-contact digital tachometer has a memory function, allowing you to store the value and review it later. *Digital tachometer can be used on machines, motors, model cars, wheels, etc. *The tachometer is comfortable to use and the casing is designed to fit comfortably in the hand. Specification: Part Name:Digital tachometer Material: plastic Size:130*65*25MM Color: black+orange *Power supply: 6F22 9V battery. (not included) *Test range: 2.5 to 99,999 RPM (rate/minute) *Resolution: 0.1 RPM (2.5 ~ 999.9 RPM), 1 RPM (over 1,000 RPM). *Accuracy: ±(0.05% + 1 digit). *Sampling time: 0.8 seconds. (over 60 rpm) *Test range selection: Automatic. *Memory: maximum value, minimum value, last measured value *Detection distance: 50 to 500 mm. (2 to 20 inches) *Time base: Quartz crystal. *Operating temperature: 0 to 50 °C. (32 to 122 °F) Package Included: 1X digital tachometer 1X English manual 1X handbag Notes: 1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. 2. Please allow a slight deviation between the data and the manual measurement. This motor tachometer has a large LCD display value that is easy to read. Wide measuring range, high resolution and reliable use. The non-contact digital tachometer has a memory function, allowing you to store the value and review it later. Digital tachometer can be used on machines, motors, model cars, wheels, etc. The tachometer is comfortable to use and the casing is designed to fit comfortably in the hand.Specification:Part Name:Digital tachometerMaterial: plasticSize:130