steelseries kinzu, dunno (maybe steelseries or razer's one), 800 dpi, low sens + mouseaccel + mousesenscap (but with his mousenscap setting, it's like he's using very low sens with only a bit of mouseaccel, lol, it's kinda retarded, i mean, he has senscap < sensitivity, which is stupid...).
But if you think that if you buy exactly the same mouse/mousepad and if you use the exact same settings as him your skill with increase a lot, then you're kinda wrong. He's just an aim whore, that's all. Some people are better at "game plans", others at timings, others at movements/dodges, no matter the mouse/settings. The best way to improve is to find your own settings/preferences, something you're confortable with, and then stick with it as long as possible. It also depends on what aspect on your game you practice the most. Some people are "naturally" good with rail for example, then they will base their game around the rail, some people are good tacticians, but have pretty "poor" aim, then they will practice to find optimal tactics, etc.... Really it depends on the player, thinking that this or that mouse will make you the best is simply false, placebo effect only. But who knows, sometimes placebo helps...
What I'm saying has already been said like billions time, but seriously, it's true.