Replaceable battery, no need to charge, safe and convenient to use. Easily clean up the blackhead, remove dirt grease inside pores, massage and tighten the skin, promote lotion and cream absorb better. Perfect for daily home use, a great beauty massage tool. Made of stainless steel, no rust and durable.   Item Name: Beauty Facial Massager Shell Material: ABS Massage Head: Stainless Steel Frequency: 8500RPM Skin Type: All Skin Types Power Supply: Built-in Lithium Battery (Included) Features: Skin Care, Cleansing, Beauty Tool, Massager  Length: 151mm/5.94“, Width: 40.5mm/1.59”, Height: 34.5mm/1.36“ (Approx.)   Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: 1 x Beauty Facial Massager