Aurora's Double Radial Blower (DRG) design incorporates high performance, low noise, and long life. The compact DRG 1200 design produces 1250 m3/hr (736cfm) of airflow and utilizes longer brushes and internal resistors extending the life of the blowers. This particular DRG 1200 functions on 24VDC and is only 2 speed (Low - Hi). It comes with the jumper harness. This blower is the largest of Aurora's line of brushed blowers offering the highest flow rate.