Review on LOK FOK Wearable Air Purifier Necklace - Round Fuchsia Personal Air Purifier for Odors, Smoke Smell, and Pollen by Belinda Rivas

This fan is quiet and seems to neutralize the surrounding air. My sister used it on a plane to California. The stewardess saw that she was wearing it and a blue light was on. She asked how the block is fed. It has a lithium battery and should not be turned on during flight. Luckily she can use it in the office or in a restaurant.