DIGITAL KNEE MASSAGER 1.100-240V, 50/60 Hz 2. Rated Power: 10W, 5V, 2A. 3. lithium battery 3000mAh 4. 10 mins timer 5. Heating: three levels 6. Function: vibrating, Red light, magnet Laser 7. LED touch screen 8.Three button for easy control 9. Timer : 10 minutes 10. 2-in-1 infrared heating pad and knee massager 11. To help ease joint pain, swelling, and muscle stiffness