Brand Name: OLOEY Is Batteries Included: Yes Material: Acrylic Origin: Mainland China Power Source: Electric High-concerned chemical: none Voltage: 220-240V Number of Pieces: One Unit Function: Facial Clean Function: Skin Rejuvenation Function: Dead Skin Removal Function: Anti Wrinkle Working Principle: ION+ Working Principle: Ultrasonic Working Principle: ION- Working Principle: EMS Commodity Quality Certification: ce Certification: CE Manufacturing Process: Machine Made Modelu Number: F501 Choice: yes semi_Choice: yes