The MHR-04 Plug in Rotary Encoders ROHS manufactured by SM Switch is a multi-function device designed to provide a variety of control features like count, stop, reset, switch & parameter adjustment with pushbutton action. It is of high reliability with smooth shaft operation and high resolution potentiometer. This rotary encoder is also environmentally friendly due to its ROHS compliance. It is suitable for a wide range of applications, such as industrial sensing, machine automation and medical equipment. The MHR-04 has torque rating of 18gfcm, a O resolution of up to 10KO, and an operating voltage of up to 5V. It is also available with optional illumination options. Overall, the MHR-04 is a versatile, cost-effective, and accurate solution for controlling the speed and direction of rotary motion.