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 digtal Sampling Time: 0.5s(above 120RPM) Data Storage Capacity: 60 Readings Auto Power Off: After 20s Operation Temperature: 0 to 50(32 to 122) Operation Humidity: 10 to 90%RH Storage Temperature: -10 to 60(14 to 140) Storage Humidity: 10 to 75%RH Power 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; safety eyewear is recommended. 3. Do not use it near gases or in other potentially areas. size:145x90x35mm Material:ABS plastic colour:Red+Black Package Contents: 1 * TL-900 Tachometer with a reflective tape Only 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.