This digital tachometer employs non-contact measurement technology, ensuring safe operation without requiring contact with high-speed rotating components. Its , handheld design facilitates portability, making it ideal for field applications. As tachometer, it offers a measurement range of 2.5-99,999 rpm, resolution of 0.1-1 rpm, accuracy of 0.02% + 1 digit, and a sampling cycle of 0.5 seconds. Compared to basic tachometers, it is better suited for tasks such as motor calibration. User-friendly features include: a backlit LCD screen (suitable for low-light environments), auto/manual modes, data hold, and auto power-off. Operating conditions: 0-50/10-90%RH, enabling it to withstand harsh factory environments where standard tachometers struggle. Its key advantages lie in: 60-group data logging capability, maximum/minimum/average value tracking, and customisable recording intervals. These features, absent in basic tachometers, an ideal choice for quality control applications. Power Supply:1 x 9V battery (Not included batteries) Color:Black & Blue Material:plastic Package Contents: 1 * Digital tachometer Only the above package content, other products are not included. Note: Light reflection 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.