Feature: 1. High Accuracy: Tachometer adopts microcomputer CPU, photoelectric technology, anti interference and junction laser, and supports non contact speed measurement, or contact speed measurement and surface speed measurement. 2. Wide Application: Contact accessories and photoelectric accessories can be switched at any time, achieving multiple uses for one machine. A speed sensor with slots can conveniently measure the speed or length of wires, cables, and ropes. 3. Data Storage: Automatically save the maximum, minimum, and last values, and can save 96 consecutive sets of data. After refreshing the measurement data, the tachometer starts to store data. 4. Easy Operation: Wide measurement range and high resolution. The large LCD screen display provides clear readings. The white backlight ensures reading in any light environment. Low battery voltage indication function. 5. Premium Design: Smooth casing design for comfortable grip and use. The instrument is exquisite and sturdy, featuring durable components and a sturdy and lightweight ABS plastic casing. Specification: Item Type: Digital Tachometer Model: DT2234E Material: ABS Battery: 3 x 1.5V AA battery, without battery Test Range: 2.5~99999RPM. Package List: 1 x Digital Tachometer1 x User Manual3 x Reflective Strip1 x Storage Box