What sets a wireless bicycle computer off when they're not in use? I have a Bontrager and a couple of Cat Eye variants that very occasionally either, all, or just one of them, get set off when they're stored at home. Usually it's a ridiculous speed (90mph). I've checked mobile phones, cordless phones, flashing bike lights, you name it and I still can't work out what sets them off. The only place that sets of a Cat Eye Micro wireless off is a supermarket check out and it happened once on a train. My Smart light also stopped the Cat Eye working when it was in dim mode.