1st post.
Vaping on bike, on the super-slab is awesome! - Much better than analogs!
I have only used my 901 (from TW) for a week now. I can not see if it is activated by the wind during sunshine, but it seamed to work OK.
I have only done one night-ride so far. It looks to be good to go at 55mph/89kph.
I do have a small fairing / medium windshield. It did not light up when held up outside the shield's slipstream.
I have not rode close enough to a Harley, to find out if noise will trigger it yet. lol
Back on topic, I think that as long as you stay in the USA and use reasonable precautions , sand will not be a problem.
ot again:
Mine fell out of my pocket into the dogs water bowl. - I think that the small holes, saved it. - I plucked it within 2 seconds.
I took it apart and dried it. (hair dryer and toaster oven at ~ 212 degrees) It works fine.