portable , Easy to use, One year warranty, Fast deliver, Good quality good price 1. Smart appearance with unique design on mainframe;2. Easy using on treatment operation;3. Accommodate to pigment nien teeth,internal pigment teeth,tetracycline pigmentation teeth and dental fluorosis;4. Nicer whitening effect,5-8 steps(VITA) to be boosted for one period of treatment;5. Specialized whitening cold ...