Resolution: 4K 30HZ (specific resolution depends on equipment and line length) Function 1: 1 in 2 or 2 in 1 output Function 2: 4K HD display Function 3: Synchronous audio and video transmission Function 4: No external power supply is required.<br><br>Product name: matrix bidirectional switch Digital lighting display 1. Output 1 indicator light 2. Output 2 indicator light 3. Input indicator light Dual-mode instant switching Say goodbye to repeatedly plugging and unplugging all devices, 4K HD 3D big screen viewing Support 4K 30Hz resolution and clear video playback. Please note:This product is not a hub, it is an audio transmission adapter. The printing batches are different, and if there are slight differences in the actual words, it not affect the use Color: Dark Gray Material: Alloy<br><br>Package Contents: 1 x 4K <br><br>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.