Amazon.com: Blackmagic Design UltraStudio Mini Recorder …

The outer shell seems to be 1/32-inch steel, and acts as a heat sink in operation–it does get uncomfortably warm. A single white LED next to the Thunderbolt port indicates output. The input ports are BNC and full-size HDMI (a good match for the HDMI/mini HDMI cable supplied with my camera). There is no power cable or adapter.

https://www.amazon.com/Blackmagic-Design-UltraStudio-Mini-Recorder/dp/B009D91314