pcs KY-040 Rotary Encoder Module with 15 × 16.5 mm Button Cap for Arduino (Pack of 6) Clw1062

Operating voltage: 5V; one round pulse count: 20. The rotary encoder can count the number of output pulses when rotating in both directions, and this count is unlimited. The key on the rotary encoder allows you to reset it to its initial state, i.e., from 0. Button cap material: aluminum alloy. Button specifications: cap diameter: 15mm/0.59in; height: 16.5mm/0.65in.