I am hoping someone can recommend a wireless device to send mouse clicks to a laptop/PC that may be far from the presenter. How far? At least 50 feet, though about 100 would be the best. The most important thing will be that it work reliably, because this will be part of a mobile setup that will ideally be usable whether or not the presenter has line of sight to the computer. I'm hoping to be educated though, so please correct me if I'm off-target with these ideas.