Features1LED SCREEN: With a large control led display that allows you to switch the heat and vibration gears and the strength gear during use at will, thus giving you a more comfortable massage experience. 2HIGH FREQUENCY VIBRATION: 3 levels of strength massage to reduce knee soreness and high frequency micro vibration massage to gradually relax stiff muscles. 3INFRARED MASSAGE: With 16pcs red LED lamp chips, combines infrared and hot compress to deeply penetrate the knee and relieve any knee soreness and discomfort. 4CORDLESS RECHARGEABLE: Kneading knee massager built in 2000mAh lithium battery, rechargeable design, lasting battery life, suitable for a variety of scenarios. 5VOICE BROADCAST: 6 Massage modes to meet the massage needs of different people. Intelligent voice broadcast design, the elderly can easily operate it.SpecificationItem Type: Kneading Knee MassagerMaterial: Cotton, ABSBattery Type: Lithium ion batteryBattery Capacity: 2000mAh (built in)Heating Temperature:45~55Product Features: Red LED light, hot compress, vibration, gasbag, Voice Broadcast, Strength Gear: 3 GearsHot Compress Gear: 3 GearsRunning Timing: 15 MinutesHow to Use: 1. The device starts in default mode and will automatically shut down after 15 minutes of use. 2. The display features two digital screens: one for intensity and the other for heat settings. 3. The battery level is displayed on the digital screen while the device is charging. 4. A voice prompt will remind you to charge the device when the battery is lower than 15% during use. 5. The display shows "E" while charging and "F" when fully charged. 6. To turn on the device, press and hold the power button for 3 seconds. Press the mode button to switch between modes. Press the heating button to turn on the heating function and adjust the settings. Press the infrared button to activate the infrared therapy function. Press the strength button to adjust the pressure settings. To turn off the device, press and hold the power button for 2 seconds. Charge the device using the included USB charging cable and a 5V2A adapter. 7. The device will emit a beep and shut down automatically when the battery is low. Charge the device promptly. 8. During charging, the indicator light will be red. When the battery is fully charged, it will turn blue. Charge the device regularly, especially if it will not be used for an extended period of time. 9. It is necessary to charge the battery of the device every 2 months if it will not be used for an extended period of time.battery Package List1 x Knee Massager 1 x USB Cable 1 x English Manual