It's refreshing and it helps me to keep the balance between posting all these Electronic Dance Music stuff and "analogue-flavour" videos.
The synth is Roland SH-2 and according to vintagesynth.com it's:
one of Rolands' early synthesizers. It is very simple in design, look and function. It sounds much like the SH-101 synth, including the typical SH-style sub-oscillator. But the SH-2 employed 2 oscillators for a much fatter sound. It has the typical Roland SH sound - it's a monophonic bass synth that's flexible enough to provoke punchy analog basses, leads and squelchy sounds. The oscillators can be de-tuned as well, another feature the popular SH-101 lacks. But it isn't very pretty to look at as it shares the same design and layout as the SH09. Still it makes a simple and easily programmable mono-synth that can be used in place of the more common SH-101. However the SH-2 is harder to find and so it usually has a higher price than other SH-type synthesizers from Roland. It has been used by Duran Duran, Groove Corporation, Eat Static, OMD, Men Without Hats, and the Eurythmics.