The Lenovo USB C to HDMI plus Power Adapter allows ThinkPad X1 Tablet users (and similarly equipped systems) to easily connect to an HDMI display and charge the system at the same time.Connect to HDMI display at various resolutions up to and including 4K2K @ 30 HzAble to charge system when connected to HDMI displayHDMI display does not require external powerSleek, durable design that compliments ThinkPad systems