Q1: Does it support 4K@60Hz?
A1: Yes, this USB C to HDMI adapter supports up to 8K@30Hz, and is backwards compatible with 4K@120Hz, 4K@60Hz. Moreover, to get 8K@30Hz, the USB C port on the Host, HDMI-to-HDMI cable and the HDMI port on the external display should all support 8K@30Hz
NOTE: Due to specification limitations, almost Macbook, Macbook Pro, and Mac Mini with Apple M1 or Intel chips don't support 8K at present, the resolution will depend on the maximum supported by MacBook.
Q2: Compatible with MacBook Air 2020?
A2: This 6-in-1 USB-C Hub Multiport Adapter is compatible with MacBook Air 2020
(NOTE: when this Mac is the Host, the max HDMI video output you can get is 4K@60Hz)
Q3: Will this usb c to hdmi hub work with a Dell XPS13-9310?
A3: Yes, the usb c hub can work with your Dell XPS13-9310
Q4: Does this USB C dock support charging?
A4: The USB C charging port supports 100W power delivery for type c devices, the USB C data port doesn't support charging
Q5: How long is the cable of this usb 3.0 powered hub?
Q5: 0.59Ft, the reinforced braided-nylon cable is designed to withstand the twists and tugs of daily use