XH-503 Electronic mask
removing floating substance produce air vitamin
Charge source: DC 5V 150mA Charge time: About 4 hours Working current:about 35mA Anion quantity:about 50000/cm3 (by Aic2000& Kec 990 test) Unit size:58*47*16mm Battery: 3.7V/500 mAH lithium battery Battery working time: about 7hours Charger(optional):AC 100-240V DC5V/350mA
XH-503 Electronic mask