Decompression stops can be painstakingly long and boring. If you have to kill an hour underwater, then a few tunes from your favorite band would help the time pass more quickly. Now with Frontgate's Waterproof Scuba MP3 Player, you can go down to 200 feet with it clipped onto your mask. The device runs on one 9-volt battery and one AA and it costs $99. The removable clip attaches the portable headphones securely to your scuba mask strap and the built-in amplifier and headset speakers provide high-quality reception.