Features: The housing is made of cast iron, deal with corrosion resistant electrostatic spraying, wear resistance and with fine durability. Using direct motor connection structure, achieve more compact structure, smaller size, more convenient to carry. Adopts brushless motor which does not generate sparks when it is working, and the motor does not wear, can provides long service time. Visualized oil window design, the remaining oil volumes are clearly visible, convenient for you to check the oil level and add oil in time. Professional refrigeration maintenance equipment, with 2.5CFM pumping rate, 5Pa ultimate pressure and 80W high power. Cordless design, more convenient to use.