6-Piece Complete Kit: 6 encoder modules include matching black knobs for multi-device projects. Full rotary encoder provide spare parts for prototypes, repairs, or simultaneous installations Aluminum Alloy Knob: Aluminum knob cap measures 15 mm diameter with 16.5 mm height. Durable encoder knob provides smooth tactile feedback and enhances device aesthetics with metal finish Bidirectional Counting: Rotation encoder module counts forward/reverse without limits. 360 degree rotary encoder module tracks position changes accurately for motor controls and instrumentation 5V Working Voltage: 5V rotary encoder delivers 20 per rotation for control. Low-voltage module ensures safe operation in DIY electronics and prototyping projects Instant Reset Function: Reset button encoder returns to zero with quick key press. Programmable rotary module simplifies calibration and restarts counting from initial state effortlessly Product Name:6-pack aluminum alloy knob cap rotary encoder module Color: black Material: aluminium alloy, plastic Operating Voltage: 5V Number of Pulses per Revolution: 20 Dimensions: 3 x 2.5 cm, knobs cap 15 x 16.5 mm Package Contents: 6*pcs Knob Cap Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.