Anion purification A large number of negative ions can balance the ions in the air to a near-natural state, making air circulation fresh. Dual USB ports The car air purifier is designed with dual USB ports, focus on fast charging, lightning experience. Voltage detection The car air purifier supports voltage detection, digital display, real-time display of car battery voltage,12-24V can be used. Strong compatibility Fully compatible,can compatible with mobile phones and tablets, supporting 5V 3.1A fast charge. Premium Material High hardness PC material, combined with seamless injection molding process, strong wear resistance. Greater flexibility The car air purifier adopts bilateral snap spring design, made of alloy springs for greater flexibility. Better electrical conductivity Top flat circular contact design for better electrical conductivity and reduced charge loss rate.