Volume Adjustment: 6.5 Volume Controller, sound quality lossless output design, smooth and transparent tone, allowing you to easily enjoy yourself in wonderful music. Volume Control is made of Iron material, with fine workmanship and all metal casing. The interface is anti interference, anti rust, sturdy and durable, and has a long service life. Volume Controller, no need for power supply, plug and play. Only 1 pair of 6.5mm interface input and output, simple and easy to use. Speaker Volume Controller has stable signal and clear and pure output audio. It is suitable for use at home or in professional recording studios to meet your different listening needs. The actual object may have color difference due to different light or display Colour:Black Material:Iron Package Contents: 2 x Fader Volume controller 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.