Neck-mounted mini negative ion air purifier $ 13.76 Product Category: Air Purifier Function: In addition to formaldehyde Power supply mode: USB Rated frequency: 20 (HZ) Use environment: home Control method: push button Applicable area: less than 10 Filter type: none Working principle: negative ion Air volume of air purifier: 151-300 cubic meters/hour Noise: 0 (dB)
