If you’re a fan of Ocean Technology Systems’ Spectrum Full Face Mask, a really cool accessory is now available.
The Spectrum Ambient Breathing Valve lets a diver breathe ambient air while at the surface, so you don’t have to use up tank air.
The ABV includes the valve itself, plus an OTS wrench and written instructions.
It retails for US$129/~111 Euros, but at the moment is only available from U.S. retailers. If you’re an international customer, you’ll need to contact the folks at OTS directly.
For more info, check out the OTS website.