... Test Range:2.5 to 99,999 RPM (r/min). Digital Laser Tachometer, Tachometer 2234C+Display:5 digits, 18mm LCDTest Range:2.5 to 99 ... :AutomaticDetecting Distance:50 to 200mm/2 to10inch(LED)Battery:6F22 9VPower Consumption:Approx. 35mA (LED)Operation Temp.:0 to 50°C (32 ... :160g (including battery) .Memory:Max. Value, Min. Value, Last Value. 2234C+ Digital Laser Tachometer, Tachometer