Multi-Port Docking Station: Expand your USB C port to 3xUSB3.0 Port, 1 TF Card Slot, 1 SD Card Slot, 1 HDMI 4K@30Hz, 1 VGA, 1 Mini DP, 1 RJ45 1000M Ethernet port, 1 Audio/Mic 2 in 1 Port, 1 Power Delivery PD2.0 Port for Mack-Book Pro 2015/2016,Chromebook & more USB C Devices. HD Video Transmission Ports: The VGA port supports video resolution up to 1920x1080P / 60HZ. With the Mini DP and 2 HDMI ports, you can enjoy a highest resolution up to 3840x2160/30HZ. This USB C dock supports to connect 2 video display in mirror mode simultaneously like : 1x Mini DP + 1x HDMI supports up to 3840x2160 / 30HZ; 1x Mini DP + 1x VGA supports up to 1920x1080P / 60HZ. But note: 1x HDMI + 1x VGA not supports to use at the same time.