Features 1、ADVANCED TECHNOLOGY: Tachometer adopts microcomputer (CPU) technology, photoelectric technology, anti interference technology, and junction laser technology, which can test non contact measuring speed (RPM) or contact measuring speed (RPM), surface speed. (m/min). 2、MULTI FUNCTIONAL: Contact accessories and optoelectronic accessories can be switched at any time, achieving one machine with multiple functions. A speed sensor with grooves can conveniently measure the speed or length of wires, cables, and ropes. 3、DATA STORAGE: Automatically saves the maximum, minimum, and last values, and can store 96 consecutive sets of data. (After refreshing the measurement data, the tachometer starts to store data.) 4、EASY TO USE: Wide measurement range and high resolution. The large screen LCD display provides clear readings. The white backlit ensures reading in any light environment. Low battery voltage indication function. 5、FINE WORKMANSHIP: Smoothly shell design, comfortable to grip and use. The instrument is exquisite and sturdy, featuring strong and durable components and a sturdy and lightweight ABS plastic casing. Specification Item Type: Digital Tachometer Mode: DT2236E Material: ABS Battery: 1.5V AA battery x 3 (without battery) Basic Parameters: Test Scope: 2.5 to 99999 RPM (r/min) non contact speed 0.5 to 19999 RPM (r/min) contact speed 0.05 to 1999.9m/min (m/min) contact surface speed Package List 1 x Meter 4 x Accessory 1 x Manual 3 x Reflective Strip 1 x Storage Box