Oil cycling flow speed monitor.
Change the oil by the power of gear-box and the exchanger.
Effectively protect the gear-box and remove the grease and metal fillings.
Flow direction automatically controlled and equal amount exchange system.
Automatically shift to oil-extracting function after completed oil exchanging.
Refrigerant charging features allows you to select a charge mode from high or low side, or use both sides.
Driving force: (Electric) DC12V
Pressure gauge: 0-60PSI
Scope: Middle, small gasoline motor car & diesel vehicle