Good description on size and function in photo. Cannot tell you a lot about this but we have sold several to joggers, ems, law enforcement, others that feel they need to record things and some that use like a go pro We are a small business and it is hard to stay in store front and ship also so tuesday is our only ship day. All mail orders that are received before 4:00 pm on monday will be shipped the following tuesday. We have a website but not much on it. Facebook under pool military surplus will give a better idea of who we are and what we sell.