1) 5Mhz frequency, 5 million stimulations to skin per second. 2) Ideal frequency for facial usage 3) Built-in rechargeable battery, making usage convenient. 4) Promotes blood circulation and activate cell activity 5) Speeding up the metabolism of aged skin thus improving freckles, acne and wrinkles Specifications: 1) Dimensions: 170 x 52 x 42mm 2) Working voltage: 12V DC 3) AC power: 120V/60Hz or 230V/50Hz Inner packing: 1pc/gift box