Create negative oxygen ions to remove dust effectively and purify air. Concentration of ions: 3 million ~ 10 million/cm³ Engage in elimination ghte PM2.5/formaldehyde/germs. More Clear and non-secondary pollution.
Convenient Bluetooth 4.0 Low-power headset, much safer to answer calls while driving, when standby on the base automatic charge. Dual USB port charges two devices at the same time. Maximum charge current 3.1A (2.1A+1A).