Seamless 4K HDMI Dongle for Wireless Streaming. Why Choose Our Seamless 4K HDMI Dongle?. Simply plug the dongle into your TV, power it on, and start casting! Mirror & Extend Mode: Supports multiple resolutions, including 4K x 2K at 30Hz and 1080P at 60Hz, allowing you to share luxurious video and audio while multitasking with your phone.
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