Features: These are continuous rotary encoders with switches that can be used based on digital rotation. Rotary encoders can count forward and backward during rotation at the output pulse frequency and are very easy to use. A wide range of applications, the rotary encoding knob can be applied to modern car music players. Volume and mute controls or data input for data selection via LED or LCD screen are also great to use with images. You will receive 2pcs rotary encoded switches, a nice combination switch that can meet your individual needs. Specification: Material: plastic + metal Size: 0.39*0.39*0.43in/1.0*1.0*1.1cm Color: as shown in the picture Package includes: 2pcs Notes: Please allow minor error due to manual measurement. The colors may be a little difference for the different monitor.