Multi-function car charger; 1.With Negative Ion Generator can eliminate peculiar smell air purification killing harmful bacteria reducing the harm of second-hand smoke & relieve fatigue 2.Compact appearance12~24V input voltage regulation system 3.Super Speed USB charging output It is suitable to use for charging wide range of electronic devices efficiently. 4. With output overvoltage overcurrent short circuit protection prevent the charging equipment from damage; 5. With ultra-high temperature protection it can automatically cut output if working under abnormal temperature.6. With anti-jamming circuit prevent equipment from interfere by car.