3-in-1: This audio switcher features an audio receiver, 4-in-1-out and 1-in-4-out function, meeting your different needs. Suitable devices: This bluetooth-compatible audio switch box can be used on a computer, laptop, smartphone, tablet, DVD player, sound box, and so on. Multiple modes: This audio adapter features 1-in-4-out, 2-in-3-out, 3-in-2-out, 4-in-1-out, a perfect solution for insufficient output ports. Suitable places: This bluetooth-compatible audio converter is a nice choice for many places, such as home, office, stage, el, and so on. Small size: This wireless audio switcher is compact and lightweight, won't take much space, so you can easily carry or store it when going out. Specification: Interface: Stereo analog, AUX 3.5mm. Power: DC 5V, 0.5A/1A. Bluetooth-compatible version: 5.0. Colour:black Material:ABS Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 set * 1 in 4 out audio distributor (The color and style of accessories may vary slightly from batch to batch, which will not affect use)