7 Pcs 7Pin 6mm Dia D Shaft 20 Points 360 Degree Rotary Encoder Switch

These are continuous rotary encoder switch with a built in push button switch (push to operate).
They can be used for data entry.

 Applications: Industrial control, robots, photographic lenses, computer input devices. circuit board design dimming and sound 3D printer LCD display, etc. ( CD players, for volume & on/off control or data selection through LED or LCD display; perfect for use with PIC microcontrollers.)