Triton 'Gills' on Indiegogo Aren't Realistic, Experts Say
Emergency air supply - Emergency underwater breathing device
Amazon.com : Portable Diving Ventilator,Waterproof Rechargeable Diving Breathing System with 39ft Hose to Support Underwater Breathing System for Adults Diving and Diving Fishing(Black, 40000mAh/2.7 Hours) : Sports & Outdoors