Touch to turn on massager aftear wearing (Charge 1 hour before use) Unisex Design for both Men and Women It can help to avoid ophthalmology disease occurred by using computer it can help to stimulate the blood circulation of eyes and relieve the tired eye. With Built-in battery and one hour charging time, it can be used many times continously (5 minutes one time). Inner size: width 5.51 × height 1.57 inch. Power supply: AC Adpater (Included) Massage theory: vibration + magnetic