Versatile Bi-Directional Functionality: This 3.5mm audio switcher supports multiple configurations including 4X1 (four inputs to one output), 1X4 (one input to four outputs), 4X2 (four inputs to two outputs), and 2X4 (two inputs to four outputs). It's designed for seamless switching between several audio sources (like mobile phones and computers) and output devices (such as speakers and headphones). Efficient 4 Port Audio Control: Manage your audio setup with ease using this 4 in 2 out or 2 in 4 out stereo audio switch. It features a four-selector (A//D) for precise control over both input and output channels, allowing you to adjust the volume directly on the device for optimal sound levels. Enhanced Audio Mixing Capabilities: Easily mix audio from multiple sources with the 3.5mm stereo audio switcher. Whether you're combining sounds from different devices or managing outputs, this switcher facilitates superior control over your audio environment, making it ideal for music enthusiasts and content creators alike. Convenient and User-Friendly Design: Experience hassle-free operation with simple knob controls for switching and volume adjustments. This plug-and-play device requires no additional drivers or power supply and maintains the original sound quality, making it an ideal choice for those seeking straightforward audio management. Note: The device supports 3-segment headphones and is not compatible with 4-segment headphones with microphones. Color: Black Material: Metal Package Contents: 1 * Audio Switcher 1 * 3.5mm Audio cable 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.