USB outlet- Our teeth polisher is USB charged, lithium battery rechargeable design,no need to change the battery frequently, more convenient.(These products are not intended to diagnose, treat, cure or prevent any disease. All information presented here is not meant as a substitute for or alternative to information from healithcare practitioners. Please consult your healthcare professional about potential interactions or other possible complications before using any product. ). 8 Replacement Heads- Equipped with 5 different soft polishing tips: 2 silicone brush head, cleaning massage cup, flat brush, pointed brush. Unique design, easy to remove stubborn stains on the teeth, flat stains, interdental stains, improve the smoothness of the teeth to make the teeth smoother and shiny. 3 Adjustable mode- The teeth polisher owns 3 vibration levels (Soft, Normal, Strong) , adapt to different kinds of dental plaque and tartar, you can easily adjust it to a suitable mode. High frequency vibration- High frequency vibration polisher head, and has strong decontamination ability. It can penetrate to where traditional toothbrush cannot reach without causing any damage to gums. Choose appropriate cleaning head based on specific size and hardness of the tartar ,then adjoin the cleaning head to teeth, lasting for a few seconds, but do not press hard, then slowly remove it back and forth to avoid any damage to teeth or gums. Effectively Clean- High-frequency vibration effectively remove teeth calculus caused by coffee, tea, smoking, which may caused by long-term and food residue depositing.When using it in your routine, leading to a fresher breath.