Before you purchase this usb c hub, you need to know: 1?Please check if your laptop owns a USB Type-c(Gen 2)/Thunderbolt 3 port, and support DisplayPort Alternate Mode, if you don’t know how to recognize it, feel free to let us know, we welcome compatibility reports from users as well. 2?Plug in the Laptop's power adapter to the USB-C Power Delivery port before connecting an external hard drive or multiple devices to the hub. 3?Due to the process of EDID (Extended Display Identification Data) communication, once you plug the monitors, it might blackout screen for a few seconds. The recovery time depends on the and monitor (1 minute at max). 4?The HDMI-Displayport cable only support transfer Displayport to HDMI signal while not support HDMI to Displayport signal. 5?If the USB C hub doesn't work properly with your new Chromecast with Google TV, please check the User Maual and Set up. Specifications: 1. Material: ABS+aluminum 2. Hub size: 4.13 x 1.85 x 0.59 inch 3. Weight: 0.25 Ib 4. Chip: Vl102+VL817+ITE6563+RTL8153B Frequest Questions and Answers 1?Questions: Does the usb c female port of the hub support video output? Answer: The leftmost c-port only supports charging and the middle A-port only supports data transferring, both of them don't support video output. 2?Can I get 4K resolution when using the hub with iPad? Answer: Our USB C adapter supports a maximum HDMI output of 4K30HZ, and the specific HDMI resolution output depends on the customer's external device.