The motor speed can be directly set using the potentiometer control knob located on the front panel. The power supply line up is available in 115VAC single phase, 230VAC single phase, and 230VAC three phase. The RoHS compliant BLU series consists of three models ranging from 20 watts (60mm), 40 watts (80mm) and up to 90 watts (90mm) output power. The BLU possesses speed regulation accuracy of + 0.5 percent. The BLU brushless DC motor can be operated at precise speeds from 100rpm up to 2000rpm. The motor meets IP65 environmental conditions.Oriental Motor USA Corp.www.orientalmotor.com800.418.7903