Features: Infrared laser technology relieves pain and reduces inflammation. Adjustable air compression to activate blood circulation and relieve knee tension. Soothing heat penetrates muscles for deep relaxation. 3000mAh rechargeable battery provides 90 minutes of use. Automatic shut-off for safety, turns off after 10 minutes. Lightweight and portable, can be used at home, office, or while traveling. Fast charging in 3 to 5 hours, saves time. Ergonomic design fits all knees and provides a comfortable massage session. 30 KPa air pressure for a comfortable and effective experience. Helps improve knee flexibility and reduces stiffness and pain. Quick Details: Brand: Generic Warranty: 7 days Warranty Agent: Dozen Device Type: Knee Massager. Input Current: DC5V-2A. Power: 10W. Battery Capacity: 3000 mAh. Charging Time: 3 to 5 hours. Usage Time: 90 minutes. Air Pressure: 30 KPa. Airflow Rate: 0.8 L/min. Auto Shut-off: After 10 minutes. Operating Temperature: 0℃ to 55℃. Weight: 0.1 kg. Package Contents: 1 x Laser Knee Massager. 1 x USB Charger. 1 x User Manual. 1 x Small storage bag for the device. How to Use: Charge the device using the included charger until fully charged (3-5 hours). Place the device around your knee and secure it well with the straps. Turn on the device using the main button and select the appropriate level of pressure and heat. Relax and let the device work for 10 minutes (it will automatically turn off after the set time). After finishing, disconnect the device and store it in the included bag.