Features:Sturdy design, reliable performance, provides accurate measurements within few seconds.Ideal for applications where a contact tachometer would be unsafe to use or will not reach.Advance LCD white backlight display, easier readings even under straight sunlight or in the dark.Data record, hold and store function, low consumption of power, comes with low battery indicator.Handheld gun shape, easy to operate.You can choose automatic or manual modes, wide range of measurement.Specifications:Condition: 100% Brand NewMaterial: PlasticMeasuring range: 2.5-99999RPMResolution: 0.1RPM, at 2.5~999.9RPM; 1RPM, at 1000~99,999 RPMAccuracy: 0.02%+1 digtalMeasuring distance: 50~500mmResponse time: 0.5s (above120RPM)Operating ambient temperature: 0 to 50C (32 to 122F)Operating environment humidity: 10 to 90% RHStorage temperature: -10 to 60C (14 to 140F)Storage humidity: 10 to 75% RHBattery: 9V (Battery not included)Package list:1 * Tachometer (Battery not included)1 * Instruction manualNote:1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.