• POWERFUL: This is a New and Improved model. It is MORE POWERFUL than AA Battery-Operated callus shaver or scraper. It is run by Nickel-Cadmium Rechargeable Battery which can be charged for 1，000 times in its lifetime. Once the battery is fully charged， it can keep running for 40 min.
• ECONOMICAL: Save money in batteries (NO AA batteries needed) and more Ego-Friendly. The savings in batteries add up over its lifetime.
• Safe for removal of hard skin from your feet at home.