Product description: This pair of knee massagers is made of premium materials, offering excellent performance and a long service life. The dual functions of heating and vibration can quickly relieve fatigue and soothe joint pain, allowing you to enjoy a comfortable life! Details : Extension Straps: Two 19.69-inch-long extension straps allow you to securely fasten the knee brace to your shoulders and other joints, providing greater flexibility in use. Adhesive Tapes: These tapes allow you to securely fasten the knee brace to the knee according to specific leg circumference, enabling users to move around freely. Application: It is suitable for thigh circumferences up to 16.9 inches and can be used for heating and massaging the knees, shoulders, and other joints. Specification: Mount Type: Freestanding Assembly Required: No Material: OK Fabric, Composite Fabric Color: Drak Blue Style: Modern Power Source: Battery Powered Rated Voltage: 5V Operating Voltage: 3.7V Vibration Settings: 3 Number of Knee Massagers: 2 Charging Cable Length: 0.5m/1.6ft Power of Each Massager: 7W Battery Capacity of Each Massager: 5000mAh Charging Time for Each Massager: About 3 Hours Usage Time for Each Massager: About 3.5 Hours Number of Motors in Each Massager: 4 Temperature: 40°C/104°F, 45°C/113°F, 50°C/122°F, 55°C/131°F, 60°C/140°F Massager Folded Size: 24.532 cm / 9.6512.6 in Extension Strap Length: 50 cm/19.69 in Applicable Thigh Circumference: Within 43 cm / 16.9in Package Size: 32188cm/12.67.13.2in Gross Weight: 0.9kg/1.98 lbs Net Weight: 0.65kg/1.4lbs Package Included: 2 Knee Massagers 2 Extension Straps 2 Charging Cables 1English Instruction Notes : 1.Please check the style and size before purchasing. 2.Please read the instruction manual completely before installation and use, and pay particular attention to the safety instructions included. 3.Please stop use if uncomfortable while using this product. 4.Please always unplug the device when not in use. Do not use while sleeping or taking a bath. 5.Please keep it away from children and pets. 6.Please do not use if you have a pacemaker or other electronic medical devices. Do not use if you have a fever, infection, or open wounds. 7.Please always follow the instructions provided with the product. 8.Please note that this product can be used in combination with mugwort bags (not included). 9.Please allow the slight color difference caused by the shooting light and a 1-3cm error due to manual measurement, and make sure you do not mind before ordering.