Features:Multi Frequency PulseUsing High And Low Frequency Pulse Repair Technology,For Under-Voltage Batteries, Batteries That Have Been IdleFor A Long Time,And Batteries That Cannot Be Charged, ItHas A Good Repair And Activation Effect.Temperature DetectionThe car battery charger automatically recognizes the ambient temperature and provides you with the appropriate battery charging voltage according to the season.Heat DissipationSpecial design Large Grid Vent Has Good Heat Dissipation Effect. Tip: This charger is only suitable for lead-acid batteries, and it is forbidden to charge lithium batteries! Specification:Voltage:12VOutput voltage:DC13.8-15.5VInput voltage:AC110-220V (50-60HZ)Output current:DC 10 (max)Scope of application:Lead-acid batteries (do not charge lithium batteries) Pakage include2M : 1*Car Electrical Circuit Tester with cable1* User Manual10M 1*Car Electrical Circuit Tester with cable1* 10M Extend Cable1* Car charger Cable1* User Manual Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.