• Rated voltage 3.7V
• Input current DC 5V=2A
• Battery capacity 3000mAh
• Charging time 3_4 hours
• Continous working time 1_2 hours

â—† 4 in 1 knee massager: Vibration, heating, infrared and laser are combined to provide relief for the knees, draininig their effusion and rejuvenating them.

â—† Infrared and laser irradiation: The dual light sources ca, reach deep layers of the knee to promote blood circulation , relieve stiffness and increase vitality.

â—† Uniform hot compress: Can generate uniform heat to  activate multiple  key joint nodes and dispel coldness, thus achieving a comprehensive effect.

â—† High-frequency Vibration: Can simulate human massage by performing an all-round massage to the knees. It effectively release pressure.

â—† Convenient to use: It features enlarged LED screen, wireless design, 100% knee fitting contour, Type-C port, adjustable velcro, and explicit indicator.