[Jengles]

At the pit we have been having to test our robot, mainly the shooter, and this can be dangerous as some of the team members haven't been hearing us say that its 'hot'. One team member found an adjustable beeper that is always 5 db above the backround noise, and was asking whether he should buy it. My question is that are these noise makers legal, and does anybody have any actual rules that go against it.