BONART ART-SP1 Magnetostrictive scaler and polisher combo. With the simple press of the button, it can function in either the scaling or polishing mode. Units available in both the 115V and 235volts. Output power for this unit ranges from 10W TO 30W with working frequency of 24.5KHZ while water supply capacity is at 25-60 PSIG (172-414KPa). Polisher speed is from 2,000-30,000 Rpm. Comes With "E" Type Low Speed Micromotor With Stand , Straight Hand Piece Attachment, Stainless Steel Prophy Angle And A Free 25K Insert. 1 Year Warranty.