Item Type: Digital Tachometer Model: DT2234E Material: ABS Battery: 3 x 1.5V AA battery, without battery Test Range: 2.5~99999RPM 1High 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. 2Wide 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. 3Data 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. 4Easy 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. 5Premium 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.1 x Digital Tachometer 1 x User Manual 3 x Reflective Strip 1 x Storage Box