To ensure the best performance and protect the inside circuit board, the shell will get warm up to 52 because the high quality aluminum alloy speeds up heat conduction. 2. The total current of all connected devices to this type c hub should not exceed 900mA. 3. USB 3.0 interferes with 2.4GHz WiFi and other wireless devices due to the similar frequencies. 4. According to Microsoft, the problem occurs only for the 2.4GHz wireless band, but not for 5GHz. Please set your router as 5GHz to avoid the problem. 5. NO TYPE C PORT is available to charge your device. Novoo USB C Hub turns a single USB-C port into one latest HDMI 4K port, two USB 3.0 superspeed ports and SD and TF card reader slots Interface 1 * USB C input connector 2 * USB A 3.0 port (support maximum current up to 0.9A, data transfer rate up to 5Gbps) 1 * HDMI Port (supports video resolution Up to 3840X2160P/30HZ, backward compatible with 2K/1080p/720p/480p/360p) 1 * SD card slot 1 * microSD / TF card slot