Benefits resolution and reliable counting: 20 pulses per full rotation provide precise feedback for rotationbased controls. Bidirectional counting with unlimited total count: can count pulses in both forward and reverse directions without a limit on total counts. Quick reset to zero: an integrated key on the encoder lets you reset the count back to 0, simplifying menu selection and calibration. Durable and compact construction: knob cap made of aluminium alloy for a sturdy feel in a small form factor. Clear physical interface: knob diameter 15 mm and height 16.5 mm deliver a comfortable, precise grip. 5V operating voltage: designed for 5V systems, compatible with typical microcontroller and electronics setups. Specifications Working voltage: 5V Pulse per revolution: 20 Knob cap material: aluminium alloy Knob cap diameter: 15 mm / 0.59 in Knob cap height: 16.5 mm / 0.65 in Counting direction: counts pulses in both forward and reverse directions; total count is unlimited Reset function: integrated key allows resetting the count to zero (initial state) Applications Microcontroller and electronics projects: ideal for Arduino, ESP32, and other 5V logic boards requiring a precise, bidirectional pulse counter for menus or parameter adjustments. Test benches and instrumentation: useful for recording rotation events during experiments or measurements where incremental position tracking is required. Small CNC or automated equipment: can be used to monitor incremental position or control inputs in hobbyist or prototype machinery. Notes The specification describes a rotary encoder with a 20pulse per revolution output, a pushreset function, and an aluminium knob cap with the stated dimensions, suitable for 5V system integration.