Mirror Mode & Extend Mode: Mirror Mode: Makes your holiday photos and favorite films so much more interesting and enjoyable on the big screen! Extended Mode: Works like a charm for multitasking. Premium HD Video & Audio Experience: HDCP, 36-bit Deep Color, 3D and uncompressed/compressed audio formats. HD transmission for an all-in-one A/V solution. Innovative Design: For Maximum Usage: Sturdy Nylon Braided Jacket: Anti-aging, anti-twisting, moisture protection, abrasive resistance. Reliable Material: Durable & Unique Design: Lightweight Alu-alloy Shell: Greater portability and convenience. Corrosion-resistant, extraordinary durability, accurate data transmission. Compatible With: MacBook Pro 2014-2015 Apple MacBook Air (BEFORE 2018)/Pro (BEFORE 2016), iMac (BEFORE 2017), Mac Pro, Mac Air For New MacBook Pro/Air, please consider USB-C to HDMI Adapter. Microsoft Surface Pro/Pro 2/Pro 3/Pro 4/Pro 5/Pro6, Surface Laptop/Laptop 2 (NOT Surface 2), Surface 3 (NOT Surface), Surface Dock, Surface Book(NOT Surface Book 2), Surface Studio Lenovo ThinkPad Helix, X230, L430, L530, T430s, T430, T530, W530 Dell XPS 13 (BEFORE 2016) Notice: NOT compatible with Thunderbolt 3 (Type-C). Transmission: NOT bi-directional (Only from a Mini DisplayPort/Thunderbolt/Thunderbolt 2 to an HDMI). Audio: System Preferences → Sound → Output. Change the audio output from your laptop to TV or other devices.