CABLESETC Aluminum Type-C to HDMI Adapter Model: OTN-91185 The CABLESETC Aluminum Type-C to HDMI Adapter 4k outputs the display of your USB-C device to your external monitor with a crisp 60Hz refresh rate. Mirror your Type-C laptop to view your favorite TV shows and movies in an enhanced, high-resolution display on your external monitor. Simply plug and play, with no complicated drivers or installation needed. Easy to use but hard to live without. Brilliant Output 4k video display Crisp 60Hz refresh rate Modern brushed aluminium design Plug and play – simple to use High compatibility with MacBook, Chromebook, , Samsung Dex mode, and more Notes: This adapter works only with computers with DP Alt Mode, not for USB-C smartphones and tablets (Except Samsung Galaxy Note 9/8 / S8 / S8 Plus, Mate 10). To enjoy 4K high resolution, please make sure to use HDMI 2.0 cable (sold separately). Supported resolutions and refresh rates of the adapter are entirely dependent on the USB-C host devices and connected display specifications. If your computer supports 4K@60Hz, while your monitor/TV only supports 4K@30Hz or 1080p, you can only output 4K@30Hz or 1080p rather than 4K@60Hz. 2015 MacBook 12inch does not support 4K@60Hz output; it has a maximum output of 4K@30Hz. To manually adjust resolution for your MacBook / MacBook Pro, hold down the "option" key and then click "Scaled.