[Precise Volume Control]: Our Passive Volume Controller is designed to accurately adjust the volume of your audio devices. With its precise control and fine-tuned adjustments, you can achieve the perfect sound level for your listening pleasure. [High-Quality Construction]: Made from premium materials, including a steel casing, our Passive Volume Controller offers a sleek and sturdy design. It not only enhances the aesthetic appeal of your setup but also ensures long-lasting durability. [Versatile Compatibility]: With multiple input and output channels, our Passive Volume Controller supports various audio devices such as DVD players, sound cards, computers, converters, smartphones, and MP3 players. It seamlessly connects to speakers, mixers, and amplifiers, making it a versatile solution for all your audio needs. [Enhanced Audio Performance]: HIFI computer sound cards, DACs, CD players, and other audio sources often have high output signals, which may require additional control. Our Passive Volume Controller effectively reduces distortion and interference, ensuring minimal signal degradation and preserving the intricate details in your music. Its precision and synchronization across both stereo channels an optimal listening experience. [Simple and Easy-to-Use]: Featuring a professional-grade 70mm volume control knob, our Passive Volume Controller allows for effortless adjustments. Its user-friendly design requires no external power supply, making it a plug-and-play solution. Additionally, the controller's solid metal construction ensures hassle-free usage and extended lifespan compared to traditional potentiometers. Input Channel: Supports a set of stereo inputs Output Channel: Supports 2 sets of stereo outputs Volume Adjustment: Professional 70mm pusher Power Supply: No external power supply required, direct insertion for use. Colour:Black Material:iron Package Contents: 1 x Passive Volume Controller(Due to different product batches, the appearance , which does not affect the use) 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.