Dunno, Warren; that's why I mounted it up under the screen, and fitted an easy-to-get-at 3-pin plug to it, so I can take it off the bike if it pisses down or I have to wash it. I s'pose I could always fill all its orofices with silicon, but it's got a few switches on it and I thought it would be too tricky.
Heh - mounted how it is, it looks like a radar detector.
[In case it's not obvious from the pic, it's suction-cupped to the underside of the screen]
I actually did that as it was hurting my head too much trying to work out a bracket for it, as space is so limited in the cockpit. Eventually I used a couple of suction cups for a car window blind, made a couple of bracket sout of some right-angle aluminium bits, then stuck it together with the velcro tabs supplied. It's good, and seems to be able to withstand wheelies and potholes alright.
The LEDs are a bit crap though - I ride with sunglasses on, and I can't tell how many are lit up. However, with the battery voltage indicated by a digital figure AND a bar graph as well as the LEDs, they're sorta redundant.