Look at the text in the front of this:
The manufacturers name is "ARP" which is the initials of the founder, Alan R. Pearlman. So "ARP sequencer" is the manufacturer ARP and the model "sequencer".. Kinda confusing for someone, which might connect ARP to Arpeggiator..
Anyways, it's a great tool! Basicly what it does, is you have 16 steps, so you can have a maximum of 16 notes sent to a synth. It does not generate audio by itself. It doesn't stop there though, you can either have 1 stream of 16 steps, or 2 streams of 8 steps each, patched to two different areas of the synth, or even two different synths altogether. Plus, you have a switch above each slider, with 3 positions. So you have 3 gates, and each step can output to one of these. So you can like control notes with some steps and maybe the filter with another. It's a super simple cubase/logic/pro tools
I'll post some sound examples later
It's a later version of my own sequencer, which looks like this:
It is amazing!
Best,
Alex