4 in 1 Jump starter 1. Peak 900AMP jumper starter starts all kinds of engine immediately when car battery not enough or temperature very low (Please noted that it is not available if car battery without any power) Built in 12V 17Ah rechargeable battery 2. With 260PSI air compressor it can be used to tyre. 3. With 3.0W spotlight it can be easy to use when need light for repair car. 4. DC 12V output socket with overload protection. And as power resources. 5. With 12V cigarette plug charging and AC 100~240V adaptor it is easy to use in house or in car. 6. Antomatic cutoff to prevent overcharging 7. Recharging about 12 hours