Used a few times. Neck massager with EMS function, built-in 950mAh battery for convenient portability. - Brand: NIPLUX - Product Name: NECK RELAX 1S - Set Contents: Main unit, instruction manual, USB charger (adapter not included) - Power Consumption: Approximately 4W - Battery Capacity: 950mAh - Size: Approximately 200x151.6x96.3mm ※This product is a household appliance. It is not a medical device.