Portable Digital Tachometer Non-Contact Surface Speed Tach Meter Gauge ±0.02%+1
Resolution: 0.1 RPM at 2.5-999.9RPM / 1 RPM at 1000 - 99,999 RPM. - Portable Handheld Gun-type Design. - Data hold function. 1x English Manual 3 x Reflective tape. - LCD with white backlight. - Powered: via 9V Battery - Supplied(not included).