I've had this pedal before but I recently picked this one up again and I plan on keeping it this time.
It is a Boss BE5, the first multi effect unit to my knowledge.
It has a compressor, overdrive / distortion, digital delay, noise suppressor and analog chorus.
The effects sound pretty similar to early individual Boss effects I've owned, which is to say they sound good.
It won't replace my other big pedal board but it is great for when I don't have room for the big board, and it's easy to grab and go, it will fit in my gigbag / case
And for those interested here are some pics of the circuitboard, it looks like 5 Boss effects wired on one board.