Features EASY TO USE: Wide measuring range and high resolution. Large LCD display provides clear readings. The white backlight ensures playback in any bright environment. Low battery voltage indication function. ADVANCED TECHNOLOGY: The tachometer adopts microcomputer (CPU) technology, photoelectric technology, anti-interference technology and junction laser technology, which can test non-contact measurement speed (RPM) or contact measurement speed (RPM), surface speed. (m/min) MULTIFUNCTIONAL: Contact accessories and optoelectronic accessories can be switched at any time, thus obtaining a machine with multiple functions. A speed sensor with grooves can easily measure the speed or length of wires, cables and ropes. END OF WORK: Smooth shell design, comfortable to grip and use. The instrument is exquisite and sturdy, with strong and durable components and a sturdy and lightweight ABS plastic housing. DATA STORAGE: Automatically saves maximum, minimum, and last values, and can store 96 consecutive data sets. (After refreshing the measurement data, the tachometer begins to store the data.) Specification: Item type: digital tachometer Mode: DT2236E. Material: ABS Battery: 1.5V x 3 AA battery (without battery) Basic parameters: Scope of the test: Non-contact speed from 2.5 to 99,999 rpm (r/min) Contact speed from 0.5 to 19999 rpm (r/min) Contact surface speed from 0.05 to 2000 m/min (m/min) Package list: 1 x Meter. 4 x accessories. 1 x user manual. 3 x Reflective Tape 1 x storage box Package List 1 x Meter 4 x Accessory 1 x Manual 3 x Reflective Strip 1 x Storage Box