1.Non-contact handheld digital tachometer with stable performance.2.Automatic and manual measurement modes for selection.3.Wide measuring range(2.5 to 99999 RPM) and high resolution.4.MAX./MIN./. values record function.5.Data hold function, data record and recall(60 readings).6.LCD screen with white backlight, easy to read.7.Capable of measuring at a distance from 2-20 inch(50-500mm).8.Auto and manual power off.9.Low battery indication.Accuracy: 0.02%+1 digtalSampling Time: 0.5s(above 120RPM) Data Storage Capacity: 60 ReadingsAuto Power Off: After 20sOperation Temperature: 0 to 50(32 to 122) Operation Humidity: 10 to 90%RHStorage Temperature: -10 to 60(14 to 140) Storage Humidity: 10 to 75%RHPower Supply: 1 * 9V 6F22 Battery(NOT Included)Note:1. You must stick the reflective tape onto the target object before measuring.2. Do not point towards eyes directly; eyewear is recommended.3. Do not use it near gases or in other potentially areas.size:145x90x35mmMaterial:ABS plasticcolour:Red+BlackPackage Contents:1 * TL-900 Tachometer with a reflective tapeOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.