Head to Amazon to buy the AquaSonic Black Series Ultra Whitening Toothbrush for the discounted price of $31.40. This toothbrush is regularly sold for $139.99! The same batteries that power Teslas are what powers your Black Series. A single overnight charge will last a full 30 days. The included travel case lets you take your black series on vacations both short and long without needing to take your charger. Comes with 8 brush heads, meant to last you 2+ years! Shipping is free. Click here to purchase.