water massage ,air bubble, heater, ozonizer, circulation filter, changing color lamp,acrylic ... (220V or 380V)blower : 1*750Wcirculation pump:1*750 Wmassage water pump : 2*1500Wheater : 1*3000Wozonizer : 1pieceunderwater lamp :1picesfilter : 1pieceHydro jet ... lamp and ozone antivirus system.7.The function of automatic water frozen preventing.8.The function of double color buttons backlighting ...