Do not buy sonic tooth cleaner. Tell your friends. Item arrives. Doesn't work and refuse to refund. Catch. They claim, when told to return item, that nothing received. Smartocity do not provide return vouchers and do not accept international calls. Someone I know who worked told me the customer service staff earn commission when they successfully block any complaints Or refunds. DO NOT BUY ANYTHING. SMARTOCITY HAVE TAKEN OVER $3500 FROM MY BANK CARD ILLEGALLY.?