&lt;h1 class=&quot;a-size-base-plus a-text-bold&quot; style=&quot;outline: 0px; margin-bottom: 0px; padding: 0px 0px 4px; border: 0px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; list-style: none; text-rendering: optimizelegibility; color: rgb(15, 17, 17); font-family: &amp;quot;Amazon Ember&amp;quot;, Arial, sans-serif; line-height: 24px !important; font-size: 16px !important; font-weight: 700 !important;&quot;&gt;About this item&lt;/h1&gt;&lt;ul class=&quot;a-unordered-list a-vertical a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 18px; padding: 0px; border: 0px; font-size: 14px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; list-style: none; color: rgb(15, 17, 17); font-family: &amp;quot;Amazon Ember&amp;quot;, Arial, sans-serif;&quot;&gt;&lt;li class=&quot;a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: disc; overflow-wrap: break-word;&quot;&gt;&lt;span class=&quot;a-list-item&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: none; color: var(--N4QdCheV6mGo,#0f1111);&quot;&gt;BEFORE PURCHASE NOTE: Make sure your laptop or PC supports &quot;Thunderbolt 3&quot; or &quot;display output mode(DP ALT mode)&quot;. Otherwise it is NOT COMPATIBLE. If you don't know if your device is compatible with our products, pls send us a message and we will help you.&lt;/span&gt;&lt;/li&gt;&lt;li class=&quot;a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: disc; overflow-wrap: break-word;&quot;&gt;&lt;span class=&quot;a-list-item&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: none; color: var(--N4QdCheV6mGo,#0f1111);&quot;&gt;How to set Dual display on MacBook: Please noted that MacBook is NOT able to run EXTEND MODE if you enable 2 or above extension display. ONLY MIRROR MODE is available if you connected 2 or above extension display on MacBook. Steps: Top left corner Apple icon--&amp;gt;System Preferences--&amp;gt;Displays--&amp;gt; Mirror or Extend Displays, both HDMI monitor are identical but different with laptop screen.&lt;/span&gt;&lt;/li&gt;&lt;li class=&quot;a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: disc; overflow-wrap: break-word;&quot;&gt;&lt;span class=&quot;a-list-item&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: none; color: var(--N4QdCheV6mGo,#0f1111);&quot;&gt;How to set Dual display on Windows: Both mirror and extend mode is available on Windows. Steps：Press Windows key + P combination command--&amp;gt;Choose Duplicate or Extend.&lt;/span&gt;&lt;/li&gt;&lt;li class=&quot;a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: disc; overflow-wrap: break-word;&quot;&gt;&lt;span class=&quot;a-list-item&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: none; color: var(--N4QdCheV6mGo,#0f1111);&quot;&gt;Plug &amp;amp; Play, Vivid 4K resolution: No driver or software needed. 2 extension display resolution is up to 4K@30Hz, please makre sure us HDMI 1.4 cable or above to avoid Screens flickering. If your source video or laptop is over 4K@30Hz. Please lower the resolution as: For Windows Menu--&amp;gt; Setting--&amp;gt; Display--&amp;gt; Advanced Display Settings, set your laptop's resolution same as or lower the resolution of external monitor.&lt;/span&gt;&lt;/li&gt;&lt;li class=&quot;a-spacing-mini&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: disc; overflow-wrap: break-word;&quot;&gt;&lt;span class=&quot;a-list-item&quot; style=&quot;line-height: normal; outline: 0px; margin: 0px; padding: 0px; border: 0px; background: transparent; list-style: none; color: var(--N4QdCheV6mGo,#0f1111);&quot;&gt;2 Years Warranty: We provide 24 months worry free warranty for this USB-C dual HDMI convector, please feel free to contact us if you have any question or suggestion, we will get back to you in 24 hours.&lt;/span&gt;&lt;/li&gt;&lt;/ul&gt;