Before you buy this item, in order to avoid some unneceary troubles,you must read those tips at first . Please note:Please make sure your device is compatible with the extension, otherwise it cannot be used. The Type-C interface of the laptop must be Thunderbolt 3 or support the USB3.1 protocol.HDMI function requires Type-C interface to support Display modeThere are 4 models available, please choose suitable model according to your needs: (1)10 in 1 Interface included --- 4K (3840*2160 / 30HZ) HDMI*1 VGA*1 Gigabit Ethernet Lan RJ45*1 (10/100/1000Mbps Broadband) USB 3.0*3 (high-speed data transmiion, flash disk/mouse/keyboard and so on) PD Type-C*1 TF Card Reader*1 SD Card Reader*1 3.5mm Audio Jack*1 (2)8 in 1 Interface included --- 4K (3840*2160 / 30HZ) HDMI*1 RJ45*1(10/100Mbps Broadband) USB 3.0*2 Type-C*1PD USB-C *1 TF Card Reader*1 SD Card Reader*1 (3)5 in 1 Interface included --- USB 3.0*2 USB 2.0*1 TF Card Reader*1 SD Card Reader*1 (4)4 in 1 Interface included --- 4K (3840*2160 / 30HZ) HDMI*1 USB 3.0*1 USB 2.0*1 Type-C*1HDMI supports 4K 30HZ, VGA supports 1080P,PD charging: supports maximum of 87W. IMPORTANT NOTE- When connecting to laptop, Do NOT support charging cellphone through USB-A or USB-C female port due to limited current.- Please provide power supply when connecting to power-hungry devices; Only support connecting 1 HDD/SSD at a time.- To prevent Wi-Fi interference, you could wrap the line body near type-c port with foil paper, or using the router of 5GHz frequency. Also, please unplug ethernet cable and PD charging cable from adapter when not using.- For laptops, we suggest connecting to non-original PD power adapter such as Apple, Dell power adapter to ensure normal use. (1)10 in 1 Features -Extensive 10-in-1 USB Type C hub, Please make sure that your laptop USB 3.1 Gen2 Type C port support DisplayPort Alt Mode and Power