1. 5 levels of far-infrared hot compress therapy: 40, 45, 50, 55, 60, effectively relieve ankle pain 2. 3 levels of massage vibration intensity, 1 level for daily care, 2 levels for sports care, 3 levels to relieve ankle discomfort, can meet different massage intensity requirements 3. 30-minute intelligent timing, to use, avoid excessive use 4. Adopt temperature control system, temperature control chip, temperature control and anti-scalding, safe to use 5. Breathable fabric, , warm and not bloated, outer layer windproof, middle layer infrared heating, inner layer anti-slip convex Buckle firmly binds the ankle to protect the left and right feet Product parameters Product name: Electric heating ankle guard Rated voltage: 3.7V Rated power: 7W Input voltage: 5V Input current: 1A Input power: 5W Battery: 1800mAh Charging time: about 3 hours Usage time: about 3 times, 30 minutes per use Power supply: USB charging Type-c Charging status: The charging indicator light is green and displays LL, and displays when fully . Note: If the product is connected to the power supply for charging during the startup process, the product automatically stop working. Do not start the product during charging. Color: Grey Material: ABS Package Contents: 1 * Ankle protector (including non-detachable rechargeable host) 1 * Charging cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.