Features: Infrared laser technology relieves pain and reduces inflammation. Adjustable air pressure to activate blood circulation and relieve knee tension. Soothing heat penetrates muscles for deep relaxation. 3000 mAh rechargeable battery provides 90 minutes of use. Automatic shut-off after 10 minutes for safety. Lightweight and portable for use at home, office, or while traveling. Fast charging in 3 to 5 hours. Ergonomic design fits all knees for a comfortable massage experience. 30 KPa air pressure for a comfortable and effective massage. Helps improve knee flexibility and reduce 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 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 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 use, turn off the device and store it in the included bag.