4.
Cordless Electric Plaque Remover&Toothbrush Teeth Cleaning Kit with Mouth Mirror Specifications: Material: ABS Battery: Lithium battery 14500 model/500 mAh Power Source: USB charge Rated voltage: DC3. Importantly it can be used continuously for 21 days with a single charge.5 inches (L) Weight: 4. Traveling without worrying about electricity.