Type: Encoder code with Switch; Adjustment method: 360 Degree; Number of pulses: 20; Pin Numbers: 7(5 working signal pins & 2 mounting pins); Rated Voltage: 5 Volt. Shaft Diameter: 6mm/0.24inch; Shaft Height: 15mm/0.59inch; Thread Diameter: 6.8mm/0.27inch; Total Dimension: 15mm x 12.5mm x 25mm / 0.59inch x 0.49inch x 1inch(L x W x H). In the forward rotation, the A line phase leads the B line phase; when reversed, the B line phase leads the A line phase. The phase relationship and number of rotations of AB can be identified using a simple digital logic circuit (exclusive OR gate and D flip-flop). By rotating the rotary encoder can be counted in the positive direction and the reverse direction during rotation of the output pulse frequency, unlike rotary potentiometer count, this rotation counts are not limited. With the buttons on the rotary encoder can be reset to its initial state, that starts counting from 0. Applications: Industrial control, robots, photographic lenses, computer input devices, such as optical mechanical mice and trackballs, controllable stress rheometers. raspberry design sensor module design circuit board design dimming and sound 3D printer LCD display, etc. (car CD players, for volume & on/off control or data selection via LED or LCD display; perfect for use with PIC or microcontrollers.) Colour: silver + blue Material: metal Package Contents: 20 x Rotary Encoder Code Switch 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.