Features1Red Lighting: Electric knee massager with 8pcs light chips to provide high density red lighting irradiates the knee, which can enhance cell vitality and make the knee healthier. 2Hot Compress: Heated knee massager with 45 to 65 infrared hot compress to penetrate into the bottom of the skin, which can accelerate blood flowing and make thermal effect. 3Improve Circulation: Cordless knee massager helps to promote circulation and strengthen metabolism, which can effectively reduce skeletal muscle pain and enhance muscle relaxation. 4Adjust Gears: Knee massager can provide push, press and knead massage for knee acupoints, with 14 gears can be adjusted, suitable for different degrees of knee strain users. 5Multifunction: Knee massage device with 8 modes can be adjust in circular, effectively reduce knee inflammation, swelling, stiffness, pain, muscle atrophy, permanence joint dysfunction.SpecificationItem Type: Cordless Knee MassagerMaterial: ABSApplication Symptoms: Knee discomfort, twisting injury, joint pain, cold legsBattery Type: Lithium BatteryBattery Capacity: 2600mAh (Included)Function: Red lighting penetration, gasbag extrusion, warm compress, vibration massageMode: 8Strength: 14Size: Approx. 21.5 x 16.5 x 14.5cm / 8.5 x 6.5 x 5.7in Heating Temperature: 45 to 60Package List1 x Cordless Knee Massager 1 x English Manual 1 x USB Charging Cable