Hi all,
I am one of the co-founders of AirBuddy. We are launching on Kickstarter this Thursday (27 April 17). AirBuddy brings a new alternative, bridging the gap between snorkeling and SCUBA. It's been designed specifically for self-guided shallow water diving (reef diving on your holidays, underwater photography, hull cleaning and underwater maintenance, coral gardening, scallops, ...). The rechargeable battery-powered air compressor provides you with fresh air from the surface - for up to 45 minutes and 40 feet (12m) deep. No air refills or tank rentals, logistics or bulky gear. It's compact and weighs about 60-70% less than other dive gear on the market. The battery recharge costs only about $0.1 (vs. $20+ single air tank hire).
Please don't hesitate to ask if you have any questions or leave a comment. Thank you!
Cheers!