9FT for extra length need if you expect a longer HDMI cable than 6ft when you are far away from the displays. Plug-and-play, like a regular 4K HDMI cable, no driver/software required. Drive one or two HDMI monitors/displays, up to 4K@60Hz resolution. Compatible with HDMI-enabled TVs/Monitors/Projectors for both video and audio transfer. 4K@60Hz USB-C to HDMI Cable. Stream sports events, watch movies, and gaming, show photos/albums directly from your USB-C phone, and never miss the game-winning touchdown or your favorite TV episodes. Direct cable connection from your smartphone to TV (stable signal transfer), no more worry about bad wifi casting issues. Fits snugly with the USB-C ports on your devices for stable signal transfer.