Judging from the included documentation, this device supports some older HDMI specifications (I can't remember which ones). However, I tested it and found that it outputs 4k 60Hz videos without any issues. So this switch will likely work with any HDMI 2.0 device. As others have pointed out, it doesn't come with a power adapter (it has a 3.5mm jack and a 5V input). However, I have never needed it for my devices. If you need one, you can purchase the following: Super Power Supplyยฎ USB to 3.5mm Barrel Jack 5V DC Cable Connector and use it with a standard USB power adapter. In terms of performance, this thing works as expected. If only one input is active, the switch automatically switches to this input. If more than one input is active, simply press the select button to toggle between them. Overall, this is a pretty good HDMI switch for the price. Pros: Automatic switching between inputs. Requires no power source. Supports 4k at 60 Hz. Cons: Cheap build quality. A power adapter is not included in case you need one
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