Product Name: Far-infrared heating knee 7.4V2200mAh, keep warming Model NO.: S01 Certification: CE Group: Middle-aged and Old Type: Far Infrared Magnetotherapy Health Supplies Logo Printing: with Logo Printing Customized: Non-Customized Condition: Brand New Trademark: SAVIOR Transport Package: PE Bag, Carton Box, Waterproof Bag Specification: ployester Origin: China HS Code: 6115300029 Product Description Main specification:Voltage: 7.4VColor: black redMaterial: Breathable fabric,OK fiberHeating elements: carbon fiberSize: Free sizeLength 48cm, width 48cm.Heating area: kneeUse time: 30-60 minites each time.Level control:Press 5 seconds for power on/power off.High level: heating after 1 minites, the temperature is 43c-48c.Medium level: heating after 1 minites, the temperature is 40c-43c.Low level: heating after 1 minites, the temperature is 38c-40c.Main function:Relieve knee discomfortRelieve back discomfortRelieve Muscle weaknessStable body, keep warming.Relieve body pain, sorenessFit people:Old people, knee discomfort, knee joint discomfort, Chills people, Air conditioning blowing more people, need keep warming people.Come with:1 pair heated knee2pcs control cable2pcs 7.4V,2000mAh battery pack1pcs 8.4V dual chargeer