Features: 1) 1Mhz frequency, 1 million stimulations to skin per second 2) Promotes blood circulation and improve cell activity 3) Built-in rechargeable battery, making usage convient 4) Prevent and erase 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