Product Name: Shoulder and Neck Massager /Charging interface:type-c /Battery capacity: 2000mAh /Rated voltage: 5V /Charging time: 3 hours /Duration of use: 1-3 hours /Rated power: 10W /Massage Principle: Heat Therapy /Power Supply: USB /Function: Infrared Therapy /Control Method: Computerized /Speed Levels: 4-speed /Color: Green