Type: Encoder code with Switch; Adjustment : 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; Dimension: 15mm x 12.5mm x 25mm / 0.59inch x 0.49inch x 1inch(L x W x H). In the forward , 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 can be identified using a simple digital logic circuit (exclusive OR gate and D flip-flop). By rotating the encoder can be counted in the positive direction and the reverse direction during of the output frequency, unlike potentiometer count, this counts are not limited. With the buttons on the encoder can be reset to initial state, 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 via LED or LCD display; perfect for with PIC or ATMEL microcontrollers.) Colour: silver + blue Material: metal Package Contents: 10 x Encoder Code Switch Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.