brand new and high quality Features:Frequency conversion and speed governing. Glass core and high precision.It is kind of resistance switch as electronic tool equipment and electronic component for the for smart family.Rotary Potentiometer only, other accessories demo in the picture is not included Specification:Resistance Types: 1K, 2K, 5K, 10Kfor Protection Level: IP65Material: Galvanizing Copper & PlasticDimensions: 4.8x2.9x2cm/1.89x1.14x0.79inchMounting Hole Diameter: 2.2cm/0.87inchColor: BlackQuantity: 1 PcNote: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1 x Rotary Potentiometer (without retail package)