The Satechi Core USB-C to 4K HDMI Adapter supports up to 4K (3840 × 2160) at 60Hz through its HDMI port.

The resolution and refresh rate you actually get depend on what your computer or tablet and your display support. For the best 4K at 60Hz results, use an HDMI 2.0 cable. HDMI 1.4 and newer cables also work.