Kingheroes Electric Toothbrush for Adults, Rechargeable Sonic Toothbrush with 4 Modes, 42000 VPM Motor, One Charge for 60 Days, Comes with 8 Brush Heads & Travel Case (Black) Kingheroes electronic toothbrush adopts the latest sonic vibration technology. The metal shaft generates the vibration force. The vibration frequency can reach up to 42,000 ti..