HydroQuip 34-2722-50-K Water Pro Ozonator Kit 120/240V 50mg - This HydroQuip Water Pro Ozonator Kit is for use with a hot tub. It includes an ozone generator, a 6' power cord with a 4-pin Amp plug, 6' of 1/4" x 3/8" tubing, a check valve, and an installation manual. It is designed to work interchangeably with 120V or 240V.