Incredible sound. This product was exactly what I had been looking for in a long time. Usually, even cheap hardware is either powder coated or anodized. These are the best-kept secret of the sandal world. They do their intended job for us. Not a blemish on it! Received package opened The snap lids are nice and snug. I like them but I think theyre a bit over priced. (VOR/DME,etc)Tuning the digits can be tricky though- the numbers can seem to "slip" or change rate of inc/decrement.