The UltraStudio Express is a Thunderbolt 2 powered capture and playback with SDI, HDMI, analog, with pro and consumer cables.
The UltraStudio Express is a Thunderbolt 2 powered capture and playback with SDI, HDMI, analog, with pro and consumer cables.
It's around £395. That is around 3x the price of the UltraStudio Mini Recorder, but offers both input and output, as well as additional connectors - amazon.com 
A good review plus specifications can be found here - expandore.com
UltraStudio is powered via the Thunderbolt connection so it powers from your laptop battery. If you're traveling light, then UltraStudio Monitor is the ideal solution for monitoring when editing and it's smaller than your phone!
395 UltraStudio Express
UltraStudio Express features built-in SD/HD SDI, HDMI and Thunderbolt connections. It comes with two breakout cables via which it expands to composite, component, S-Video, RCA audio, AES/EBU audio on XLRs, sync input, genlock for bi and tri-level sync, and RS422 connections. Connection to a camera would be by SDI or HDMI where possible and to a computer by Thunderbolt.
The formats the unit captures in are open standard DPX and QuickTime, which are compatible with all of the most common and popular software. UltraStudio Express can seamlessly be used with Final Cut Pro X, Final Cut Pro 7, Media Composer 6, Premiere Pro CS6, After Effects, Nuke, Photoshop, and DaVinci Resolve.
- HD SDI, HDMI, Thunderbolt and 2 breakout cables
- Real-time, hardware-based up / down / cross conversion
- Connect to a quality HDMI monitor for precise color correction
- Captures in edit-friendly open standard DPX and QuickTime formats
- Breakout cables feature: composite, component, S-Video, RCA audio, AES/EBU on XLRs, sync input, genlock and RS422