The interior is a patented cooling system with a single high-performance fan, the idle state noise is no more than 24 dB, and the power supply is 65W / 19v adapter. < / P > < p > the input and output are very rich, including one VGA, one HDMI, four USB 3.0, two USB 2.0, one usb-c, one SD card reader and two 3.5mm headphone audio ports. After 12 years, “world class Super project” Shantou Bay Tunnel ushers in a historic breakthrough today