There are plenty of underwater housings available for smartphones that let you capture crisp underwater video with your iPhone or Android device. The DIVEROID mini takes it to the next level by turning your smartphone into a dive computer. This modular computer syncs to your handheld device via Bluetooth. It is rated to a max usable depth of 131ft.
Users will be able to check information about their dive while taking videos and photos. The DIVEROID mini also makes maintaining a logbook and sharing data with others easy. It weighs only 1oz.[where to find it]