This tachometer has wide range of applications, such as measuring rotating of machine, motors, wheels, lathe for metal or wood cutting work, etc. With mini hand held type design, this tachometer are portable and easy to use. Feature - ColorAssorted Color - Material: Plastics+Electronic Components. - Size: 14.4 x 8.4 x 3.5cm. - Display digits: 5 digits - Measurement range: 2.5-99999 - Measurement method: non-contact type - Resolution: 2.5-999.9 0.1 - 1000-99999 1 - Measurement error: +0.02%+1dgt - Measuring distance: 50-500 mm - Response time: 0.5 seconds - Power supply: 9V battery(Not Included) - No-Contact handheld digital tachometer with stable performance. High accuracy minimize the influence about the inspected objects. - LCD screen with backlight, easy to read. Let the user use our product in dark environment easily. - Auto and manual power off. Not saved, but also can save the serving life. - indication. An full power 9V Battery can measure for more than 5000 time. Also the battery compartment are designed with easy to charge . - Other Functions: Auto and manual power off, indication, measure record auto saved. - Caution: Do not point the beam towards eyes directly; safety eye wear is recommended. Package list: 3 x Tachometer 3 x Instructions 3 x Reflective Stripe