Ok, so to clear it all up...And I apologize that this is just like the above example...

Focus Band always has that one in ten chance of working. It's just that the odds of it working consecutively get worse and worse.

Now, this does not mean it is like Protect, where, it goes 100%, 50%, 25%, etc... It means this...

Everytime you flip a coin there is a 50-50 chance of heads. You always have that equal chance of getting a heads, but, flip a coin 5 times, odds are not ALL of them will be heads. ALL 5 coin flips have the EQUAL chance of being heads, but, the repetition of heads is what becomes unlikely as the flips increase. It's the same with focus band, just like the coin flip, it ALWAYS has the one in ten chance of working, but, consecutively it gets worse and worse...

1 in 10 [working 1 time]

1 in 100 [working twice in a row]

1 in 1000 [working thrice in a row]

Since I'm going into detail, here's more detail. The way you calculate odds like this is like this...

The coin flip. What are the odds of getting heads 5 times in a row? Well, each flip has a 1/2 chance, so, it's 1/2 x 1/2 x 1/2 x 1/2 x 1/2 which is a 1/32 chance of flipping a coin 5 times in a row and getting heads all five times. It's the same with focus band working...

1/10 x 1/10 = 1/100 [chances of f.band working 2 times in a row]

1/10 x 1/10 x 1/10 = 1/1000 [chances of f.band working 3 times in a row]

So there ya go, hey, that rhymes!