ULTRA PORTABLE WEIGHS LESS THAN 15 POUNDS ONE DIVER TO 30FT/9M INCLUDES NOMAD BACKPACK RECHARGEABLE EASY SWAP BATTERY PROUDLY ASSEMBLED IN FLORIDA, UNITED STATES Nomad is a battery powered air-supply buoy for diving that delivers you compressed air from the surface through a 40-foot long hose as you breathe underwater. Extremely compact and user-friendly, Nomad provides 45-60+ minutes of dive time per battery, depending on diver usage.