Pls reply laura201226@hotmail.com or call 0086-13864395822 to get details. Auto battery charger & booster Characteristic(1200A to 3500A): Input voltage:220V/380V Output voltage:9-30V Start current:1000A/1600A/2000A/3500A Max Charge current:50A/100A/200A/300A Dimension:45cm*37cm*72cm Stall:12V/24V Weight:35K g to 80Kg Suit for various of auto battery¡¯s slow/fast charging and force start. With the principle for slow/fast electrolyteion electrolyte of the batteries keep the high charging efficiency. Equipped with import fast both bridge rectifier, charging different batteries(12V to 24V)at the same time,12V or 24V and current display show the charging cases. Can charging more battery at same time. Unique automatic monitor for voltage and currents. Protection device for over loading and short circuit. Model:OL1200A,OL1600A,OL2000A,OL3500A,OL40A,OL60A,OL80A