In order to avoid the battery run down lead to a disconnection, it is recommended to keep your device be charging while displaying. 2. The USB C male port is only used to charging while displaying, could not connect usb c hard disk drive to transfer data. 3. A USB-C PD charger and cable is required for fast charging. Smartphone original OEM adapter ONLY offers standard charging. Original adapter is highly recommended to prevent overheating. FEATURES USB-C to HDMI Adapter Enables a connection from a USB-C device to an HDMI enabled TV, monitor or projector to display video and audio, mirror or extend your screen with HDMI port. 4K 60Hz UHD Resolution Supports up to 4K (3860x2160)@60Hz resolution as connected 4K@60Hz capable computer, cable and display, with clearer pictures and more smooth video than 4K@30Hz, 1080p. Fully Compatible with New iPad Pro and MacBook Air 2018, 60hz smooth refresh rate is available. USB-C PD Function A bonus design with a USB-C charging port that delivers up to 20V/3A (60W) power for charging your devices while displaying video. Compatibility Works with USB-C port (Thunderbolt 3 compatible) devices with DP alt mode such as 2018 iPad Pro/ MacBook Air, 2018/ 2017 / 2016 MacBook Pro, MacBook 12'', Surface Book2, Chromebook Pixel, Samsung Galaxy Note 9/S9/S9 Plus/S8/ S8 Plus, etc. (For mobile phones, please refer to the detailed compatible lists. NOT for Nintendo Switch.) Durable Design Slim and light aluminum alloy exterior, corrosion-resistant and conductivity 24 gold-plated, ionized finish, reinforced TPE cable coating.