other design, you can use it in bed, car,office and many places. the specification as following: 1. Novelty design, fit for different user. 2. Apropos design, five optional massage manipulation, the massage force and rhythm has three levels for adjusting. 3. Have five high frequency massage kneed head. 4. Infrared warm up function 5. Time can be set to 15 or 30 minutes. 6. Can help release soreness and tiredness. Relax your whole body. 7. Promote energy and immunity, can help promote body incretion sleep and digest. 8. With plug use on car, you can massage in car. 9. Use standard power adaptor, ensure safety. Specifications: Voltage: DC 12V Rated Power: 12W