4K Support with USB C to HDMI Adapters
The UC-HDMI-W USB C to HDMI adapter is similar to the USB C to DisplayPort in that it supports 4K Ultra High Definition with video resolutions of up to 3840 x 2160. Its clarity is the highest level of visual fidelity currently available on today’s market.
The CoolGear UC-HDMI-W USB C to HDMI adapter supports multi-channel audio signal pass through, this eliminates the need to carry an additional audio cable when connecting to an external HDMI display with audio playback support.
Simple Plug-N-Play Design
For the HDMI user, connecting to devices like your USB Type-C enabled laptop, desktop, or tablet is easy giving you maximum results with little effort! The USB C to HDMI adapter takes advantage of USB-C’s compatibility with device standards, including its ability to deliver power to connected devices.
Our adapter supports Plug-N-Play operation, meaning that there are no additional software/device drivers that need to be installed or external power supply to plug in to operate.
Note: Your computer must support HDMI Alt Mode.
HDMI Alternate Mode for USB Type-C; the HDMI Alternate Mode for USB Type-C Connector Standard. This will allow HDMI enabled source devices to utilize a USB Type-C connector to directly connect to HDMI enabled displays, and deliver native HDMI signals over a simple cable without the need for cumbersome protocol and connector adapter or dongle chips.
HDMI Alt Mode will support the full range of HDMI 1.4b features such as: resolutions up to 4K, Audio Return Channel (ARC), 3D, HDMI Ethernet Channel (HEC), and Consumer Electronic Control (CEC). This HDMI passive cable will utilize the USB Type-C connector on the source side and any HDMI connector on the display side. Unlike the other Alt Mode display technologies (e.g. DisplayPort, MHL) which require various adapters or dongles to connect to HDMI displays, HDMI Alt Mode enables an easy connection via a simple USB Type-C to HDMI cable.
This information comes from Wikipedia.org