Only weighs 8 pounds, smaller than a briefcase at 12"x12"x3", durable and almost waterproof, complete with LIFE-O2® 6&12 lpm "Norm & High" regulator of Emergency Oxygen in disposable/replaceable (or low-cost refillable) 113 liter cylinder, LIFE® CPR Mask fits adult/child; for Philips AED (OnSite or FRx) or Heartsine samaritan AED defibrillators for immediate easy first-aid oxygen administration, and if needed before fibrillation or after successful defibrillation.