Product DescriptionSharp Image with 4K ResolutionThe Mini DisplayPort Adapter can support the resolution of up to 3840×2160@30Hz refresh rate. Brighter and sharper images make you immersed in a more colorful and vivid world. It is ideal for home theater.SpecificationInput: Mini DisplayPort Output: HDMI Transmit audio and video from the mini DisplayPort to HDMI. Supports video resolutions up to 3840×2160 Supports uncompressed audio such as LPCM Cable Length: 0.6ftCompatibilityMacBook Air 2015, 2016; MacBook Pro 2011,2012, 2013,2014, 2015, Surface Pro 3, Surface Pro 4, Surface Pro 5(NOT Surface/Surface 2 for Windows RT), ThinkPad P71, ThinkPad P51 Mobile Workstation, ThinkPad X1 Yoga, ThinkPad X1 Carbon (4th Gen), ThinkPad T470s, ThinkPad T470p, ThinkPad T570, ThinkPad Yoga 370, ThinkPad L470, ThinkPad L470, Dell XPS Tower Special Edition (2016), Dell New XPS TowerNotes- Mini DisplayPort that supports both audio and video is only available on Apple devices released after April 2010. Please make sure whether your device is compatible with the adapter before purchasing it.It is not compatible with MacBook Pro released after 2016. – It can only transmit from mini DisplayPort to HDMI because it is not bidirectional. – Please use HDMI version 1.4 cable within 8 meters to ensure the high performance of this item. – It is not compatible Thunderbolt 3.0Mirror Mode: Present the content from your computer to larger display in mirror mode, so everybody follows you while doing a speech, a presentation, a meeting etc;Extend Mode: Multi-tasking with extend mode when connecting with external display, you can double your workspace or enjoy a movie when doing some easy task;