?Warmest gift for the elders, famliy, friends? LONG press the button for 3 seconds to turn it ON/OFF Short press the button to switch mode: - Red-highest temp (65?/149? to 75?/167?) - Blue-medium temp (55?/131? to 65?/149?) - Green-lowest temp (40?/104? to 60?/140?) Different Power Supplies Available: - 5V Portable Charger (Note: 5V Portable Charger needs to purchase separately.) - USB Car Charger - Computer USB Port - Any other 5V USB port Without worrying about electric leakage, extremely secure and reliable The Heated Ankle Brace Size: - Foot strap and ankle strap are long enough and adjust by hook and loop - Fits most adult feet (above size 5), suggest for people who weigh below 200lbs - For both right and left foot: The foot circumference is 9.8" in length, the ankle circumference is 11" in length, length of hook band is not included, so it can fit most ankle and foot circumference Use Recommendations: - You can wear the heated ankle brace barefoot or wear your sock on for more comfy - We don't suggest wearing the ankle brace in the shoe, it's not made for really walking - It's recommended to wear the heated ankle brace for 30 minutes at first use, you may need one or two nights to get used to it Package Includes: - 1 x heated ankle brace - 1 x USB cable - 1 x Instructions manual Washing Tips: - Hand wash in room temperature water - Don't use the washing machine dehydration or expose to the sun Note: - Please note if have any discomfort during the use of the splint, you should take it off - It is recommended to adjust to the right temperature. If you feel overheated, you can put on your socks before using