Just saw something interesting at an electronics shop the other day. It's a USB air purifier and it just costs $4! It says that it eliminates unwanted odors and dusts that are airborne, improves air quality which ultimately helps boost the energy and mood of people. I've been looking for air purifiers before because my nose is very sensitive. Have you tried out such a device before? Is it effective? Do you think it's worth the 4 dollar purchase? Yes, it's cheap but I don't wanna throw away 4 bucks for a useless device.
It doesn't sound like it would "clean" enough air to make a difference. A $4 air purifier sounds like a gimmick. A more expensive untit may work in a small, enclosed area.
