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This Thunderboltto HDMI Adapter is special designed for MacBook Pro/ MacBook Air/ Mac Mini/ iMac with Video 1080P， this adapter can send Audio and Video from your MacBook Pro/ MacBook Air/ Mac Mini/ iMac， or PC with Mini DisplayPort to a HDTV， Monitor or Projector.Since virtually any modern HDTV/ Monitor/ Projector has the universal HDMI Port， this adapter will make sure you can:1. Extend or mirror your workstation to another screen2. Give presentation to your classmates， students or colleagues with your own MacBook or laptop3. Share videos with your friends and family on a bigger external screen or TVIn 2011， Apple introduced Thunderbolt port， which is essentially a Mini DisplayPort when used for Audio/ Video.Yes， it transfers AUDIO too! But NOT for all MacThe following Mac/ Apple computers support audio pass-through via Mini DisplayPort.MacBook 13" Model 7，1 (Mid 2010)Mac Pro Model 5，1 (Mid 2010)MacBook Pro 13" Model 7，1 (Mid 2010)MacBook Pro 15" Model 6，2 (Mid 2010)MacBook Pro 17" Model 6，1 (Mid 2010)MacBook Pro 13" Model 8，1 (Early 2011 / Thunderbolt)MacBook Pro 15" Model 8，2 (Early 2011 / Thunderbolt)MacBook Pro 17" Model 8，3 (Early 2011 / Thunderbolt)MacBook Air 11" Model 3，1 (Late 2010)MacBook Air 13" Model 3，2 (Late 2010)Mac mini Model 4，1 (Mid 2010)iMac 27" Model 10，1 (Late 2009)iMac 27" Model 11，1 (Late 2009)iMac 21.5" Model 11，2 (Mid 2010)iMac 27" Model 11，3 (Mid 2010)Features:- 100% Brand New and High Quality- Connect Mac， MacBooks， PC laptops to monitors， TV/ HDTV， projectors- Compatible with all Macs/ MacBooks with Mini DisplayPort/ Thunderbolt- Support resolutions up to 1080p (FullHD) and 1920 x 1200， no compromise in video quality- Support audio: DTS/ DTS-HD， Dolby Digital/ Dolby TrueHD， and Linear PCM (LPCM)- Support Mini DisplayPort 1.1a input and HDMI 1.3b output- Support HDMI 225MHz/ 2.25Gbps per channel (6.75Gbps all channels)- Support HDMI 12bit per channel(36bit all channel) deep color- Power from Mini DisplayPort source- Elegant white colour， consistent with your Apple computers- Mini size， easy to carrySpecifications:- Connectors: Thunderbolt / Mini DisplayPort (male) --> HDMI (female)- Video: FullHD， 1080p， 1920x1080p- Audio: LPCM， DTS/ DTS-HD， Dolby Digital/Dolby TrueHD- Compliance: Mini DisplayPort v1.1a， HDMI 1.3b- Progressive: 1920 x 1200， 1080p， 720p， 576p， 480p- Interlaced: 1080i， 576i， 480i 1.2ACompatible Models:This adapter can transfer AUDIO too! But NOT for all Mac， the following Mac/ Apple computers support Audio pass-through via Mini DisplayPort.- MacBook 13" Model 7，1 (Mid 2010)- MacBook Pro 13" Model 7，1 (Mid 2010)- MacBook Pro 15" Model 6，2 (Mid 2010)- MacBook Pro 17" Model 6，1 (Mid 2010)- MacBook Pro 13" Model 8，1 (Early 2011 / Thunderbolt)- MacBook Pro 15" Model 8，2 (Early 2011 / Thunderbolt)- MacBook Pro 17" Model 8，3 (Early 2011 / Thunderbolt)- MacBook Air 11" Model 3，1 (Late 2010)- MacBook Air 13" Model 3，2 (Late 2010)- Mac mini Model 4，1 (Mid 2010)- iMac 27" Model 10，1 (Late 2009)- iMac 27" Model 11，1 (Late 2009)- iMac 21.5" Model 11，2 (Mid 2010)- iMac 27" Model 11，3 (Mid 2010)- Mac Pro Model 5，1 (Mid 2010)- Lenovo: ThinkPad X1- Dell: XPS 13 Ultrabook/ XPS 14z/ XPS 15/ XPS 15z/ XPS 17- All other Display Cards and Laptop with Mini DisplayPortHere is the link - how to solver "My HDMI cable is connected but there is no audio"- http://store.moshimonde.com/faq-minidisplayport-to-hdmiHow to use:1. Connect the cable to your Apple MAC by the thunderbolt side(also thunderbolt was called mini displayport)2. Connect its female HDMI end to an HDMI cable that goes to your TV/monitor/projector3. Then you can view the movie or PPT on the big screen! Enjoy it!How to set the resolution :- You can go into “System Preferences” > “Display“. You’ll be able to see 2 display preferences dialog， one for your prime MacBook display and one for the external monitor. You can use the settings in dialogs to adjust the screen resolution， color intensity and if you have a monitor that can be swiveled (rotated) you can tell Mac OSX to rotate the display to a certain angle for that particular display.How to set the mirro function:- Video transfer can only work for some Mac， not for the version before 2011. Please check it before puchase this item.Note:Video transfer can only work for some Mac， not for the version before 2011. Please check it before puchase this item.You need a HDMI cable when you use this item.Package Contents:1 x Thunderbolt to HDMI Adapter