Air Supply® Rechargeable AS-300R Wearable Ionic Air Purifier Take Rechargeable Fresh Air With You Wherever You Travel. Now that we are flying again use your Air Purifier AS300R together with your mask thus enhancing the protection factor up to 32 times! MSRP $139.00 $118.15 Rechargeable! No more expensive batteries to buy. Helps defend against Coronavirus sized particles. 28 hours of run time per charge, charges via USB cable. Propels cleaner fresher air into your personal breathing zone. Defends against viruses, whether mutated or not. Portable, ultra light, mini and wearable. Most air pollutants and contaminants are destroyed or forced away from wearer. Ideal for air travel, movie theaters, waiting rooms or any confined space. Silent, fan-less, filterless and maintenance free technology. Platinum permanent emitter vs. noisy carbon emitter that needs replacement. B102