it starts slow and gets quicker! what the **** more is there to know me old sheepshank! you can walk till like level 3 or 4 or some such shite but you`ll jog and **** your pace up and have to wait at one end then after 10 mins you`ll be blowing out your arse, mint huh!
It should be fairly simple to work out - time how long a bleep is at level one, and then convert that into kph. After some quickly listening to my test (I'm sad enough to have it on iPod), the first level is 9 kph (8 secs to cover 1 shuttle of 20m); the second level is approximately 10.2 kph (7 secs). The difficulty being measuring the exact time between shuttles at the higher level. I would suggest that it goes up 1 kph increments, but I wouldn't swear to it.