?Lifetime Customer Service?Provides 12-month warranty (extra 6 months for registered members) and life-long technical support. Feel free to contact us for any issue before and after your purchase. We will always be here and ready to solve problems for you. ?Mirror and Extend Mode?Supports three different modes under Windows OS with mirror laptop or extend the screen to two identical or distinct external displays [AAA, ABB, ABC].(Not allow for split screen under Mac OS due to the limit of Mac OS[supports AAA and ABB only]. Tablets/phones can mirror one screen only). ?Dual 4K Display?Extend or mirror content to dual displays in stunning resolutions up to 4K@30Hz, or streaming 4K@60Hz video on single monitor(must support DP 1.4 ). ?Universal Compatibility?Compatible with Mac OS, Windows, Linux, Android system with USB-C port which supports "DisplayPort Alternate Mode"(not all USB-C ports/systems support Alternate Mode functionality). Such as MacBook/MacBook Pro2020 2019 2018 2017,MacBook Air2020-2018,iPad Pro 2018 ,Dell XPS13/15,Samsung Galaxy S9/S9+,etc. ?Plug & Play Adapter?No additional driver/software required. Instantly extend your laptop, tablet, or phone’s USB-C port into dual HDMI ports, Ensure you to enjoy 4K UHD resolution sports events ,movies,TV shows,games,presentations, websites and so on.