... 3,energy-saving 4,environmental protection Shenzhen Newstart Rechargeable Sonic Toothbrush Details: Rechargeable Ultrasonic Toothbrush Specifications Oscillation Frequency ... system,20000stroks/min to 3200trokes/min,,120 sec timer,the featured timer pause momentarily every 30 seconds alert ... per quadrant for the 2 mins use.(2)Induction charging,input voltage100V~ ...