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Product parameters: ​ Rated power: 5W, rated voltage: DC 5V, rated current: 1A ​ Battery capacity: 2000mah ​ Timing function: four-speed timing (15min / 20min / 25min / 30min) ​ Heating temperature: 3 temperature adjustment (low: 45℃±3℃, medium: 50℃±3℃, 55℃±3℃) ​ Product material: ABS ​ Single color box size: ​ 28*13*20cm, 780g (button type) ​ 28.5*12.8*20cm, 834g(touch screen) ​ ​ Product list: Knee protector, TypeC charging cable, English manual, English neutral color box ​ Product features: ​ 1: Fully surround the airbag (inside and strap) extrusion, cycle to charge and release air, so that the knee can enjoy pressure relaxation massage; 2:3D surround to protect the damaged knee joint, built-in 20 red physiotherapy light beads, specific wave long-term red internal and external bands penetrate into the knee, huanjie fatigue pain discomfort; ​ 3: Through the vibration, the knee muscle repair massage, Shu huanjie pressure, so that it fully release pressure and relax; 4: three heating mode, warm hot compress knee joint, carbon fiber far-infrared heating sheet, heating temperature: low: 45℃±3℃ (huanjie knee acid), medium: 50℃±3℃ (huanjie knee sting), : 55℃±3℃ (huanjie walking pain) ​ 5: One-click start, large screen display, simple touch interface, the elderly can also use;