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① Is the voltage is fixed or variable?
HF-8Whisper,HF-7Premium and HF-7Classic are counter-top oral irrigator and their’s voltage are fixed.We could make any voltage that fit certain countries.And HF-3Premium is for traveling and the voltage is variable between 100-250V.
② What is warranty of the products?
One month for replacement and 2-year for repairing.
③ One product is for one person or could for other families？
As long as each one has there own color tip,it could be for other families.
④ Can use mouthwash instead of water?
Yes,it can.Mouthwash and salt water are both ok.
⑤ what kind of battery does rechargeable type use?
It’s Ni-MH battery.
⑥ Does it replace floss or toothbrush totally?
It just replace floss and not toothbrush.
⑦ Is it loud when using?
The noise of HF-8Whisper is much lower than many other oral irrigators.
⑧ Is it waterproof?
HF-8Whisper,HF-7Premium and HF-7Classic is IPX-7 waterproof.HF-3Premium is not waterproof for it is in low-voltage.
⑨ Do I need a transformer when using in another country?
It depends on the voltage of the country,it needs a transformer if in different voltages.
⑩ How long will be the battery last when fully charged of HF-3Premium?
About 15 times of refilled water.It depends on the interval time of using.