Yes. All ports on the USB-C Multimedia M1 Adapter can be used at the same time, including both HDMI ports.

• Install the SiliconMotion software first. Both HDMI ports need the software to work.
• One HDMI port supports up to 4K at 60Hz and the other up to 4K at 30Hz.
• The adapter is bus powered, so connect a charger to the USB-C PD port when using all ports for the best performance.