- This new versatile 2.1 Cable is backwards compatible and can be used with all existing 4k HDMI devices in your home and office - 8K@60Hz, 4K@180Hz, 1440P@360Hz, & 1080P@480Hz+ - Dynamic HDR Supports a range of higher resolution and refresh rates. - Improved bandwidth from 18 Gbps (HDMI 2.0 ) to 48 Gbps (HDMI 2.1 )