Water tank volume:from 200 to 299 ml; Jet pulsation frequency:from 1600 to 1999 imp/min; Water jet principle:PULSE; Power type:RECHARGEABLE; Number of operating modes:4 or more; Number of nozzles:4; Power Source:Rechargeable Battery; Age Group:adults; Commodity Quality Certification:3C,ce; Type:Electric Oral Irrigator; Brand Name:Morn well; Item Type:Oral Irrigator; Morn well Model:F18; Origin:Mainland China; Certification:CE,CCC;