Features: 1. silent, digital control circuit. 2. Porcelain enamel tube, which is against the oxidation. 3.E structure air pump which is stable and has long working life. 4.Epoxy resin made of and vacuum encapsulated high pressure module. 5.Original anti-circumfluence device, preventing water from backing to the ozonator. 6.ABS industrial plastic, smooth and strong. 7.Original CPU,EMC anti-jamming design. 8.CE approval adapter. Techinical parameter: Power supply: 220V+_ 10% Frequency: 50HZ Watta:18W Ozone output:400mg/h Weight:1.2kg Size:260x180x60mm Timer: 30min.