Technical parameter: 1. Two speed power switch for strong and weak massage 2. In-depth massage of the double heads will more effectively relieve discomfort and renew vitality 3. Streamline design, artistic, tasteful and fashionable 4. Various kinds of silicon rubber heads can be chosen 5. Rated frequency: 56Hz-60Hz 6. Motor rotation speed: 3, 800+/-10% 7. Rated voltage: AC 110-230V 8. Rated power: 28W