Switcher Edirol v4

The compact video mixer that's full of features.
An affordable 4 input /3 output video mixer with
many high quality video effects. Use it wherever
you need to show video.
- 4 input/3 output design.
- High quality images from all digital processing.
- High quality video effects and multiple wipe
patterns.
- V-LINK — connecting music and video.
- Presentation mode.
http://www.roland.com/products/en/V-4/