SHIELD AER – a personal, wearable air purifier that creates a safe breathing zone by repelling particles from your breathing space – by up to FOUR FEET!. SHIELD Aer provides the best in personal purification technology: Creates a 4 ft. clean-air zone (ionized bubble) Comfortable breakaway lanyard Attach your own personalized lanyard for a fashion statement Long lasting – up to 28 hrs of purification Rechargeable – lithium battery / recharge unit in 3-5 hrs Convenient Purification – does not interfere with breathing Supports masks, increasing efficiency exponentially High-end gold-plated stainless steel collectors Produces ion density of 50 million per cubic cm Creates ion wind of 90 feet per minute