Clear LCD Display: The built-in backlight ensures optimal visibility in any lighting condition. Memory Function: The device automatically records the maximum, minimum, and last measurement values for easy reference during the measurement period. Versatile Dual-Function Design: This device supports both contact and non-contact measurements along with linear velocity measurements. It comes with three different contact adapters to accommodate various measurement needs. Wide Measurement Range: Capable of measuring photoelectric speeds from 2.5 to 99,999 rpm, contact speeds from 0.5 to 19,999 rpm, and linear velocities from 0.05 to 1999.9 m/min or 0.2 to 6,560 ft/min. Measurement accuracy is ±(0.05%n+1d) with a sampling time of 1.0 second for speeds below 60 rpm. Made from lightweight yet sturdy ABS plastic, this device features an ergonomic design that ensures a comfortable grip for effortless use. Diverse Applications:Primarily used for measuring revolutions per minute (RPM), frequency, surfaces velocity, and length in equipment such as motors, fans, automobiles, and paper mills.