Technical parameters 1 The A-weighting sound pressure level produced by the Air Master does not exceed 80 dB. 2 When the input water pressure is the required minimum value of 0.15 MPa, the water output is not less than 20 mL/min. 3 The handpiece can withstand 250 cycles of sterilization without corrosion and damage. 4 The polisher nozzle is rotatable. 5 Within the normal pressure of water supply of 0.15MPa to 0.4 MPa and the working pressure of 0.25MPa to 0.4 MPa, there is no leakage of water or air.