AU3401 3.5mm Audio Adapter Switcher Laptop Tablet Remote Control 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, hotel, 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) 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.