Knee Heating Pad,3 Temperature Control USB Heating Knee Support Brace,hot and cold therapy for Knee Injury, knee arthritis,Muscles Pain Relief Relax,Knee Stiff, Strains, Fits Knee Calf Leg Arm;

What can this heat knee pad help for?
- Help relieve knee pains associated with chronic arthritis
- Aid in knee injury or surgery recovery
- Leg or arm muscle fatigue soreness, cramps relief
- Keep knee warm in cold weather

When using the USB cable, the output is about 5V/500mA:
- Highest (red): the temp is 131-134.6℉, hot, for long time use
- Medium (white): the temp is 113-118.4℉, warm, for long time use
- Lowest (blue): the temp is 96.3-104℉, lukewarm, no need to use this setting

When using the AC adapter, the fixed output is 7.9V/1.1A:
- Highest (red): the temp is 176-194℉, super hot and heats in seconds, 10 mins later you may need change to a lower heat setting
- Medium (white): the temp is 167-176℉, very hot, 30 mins later you may need change to the lowest setting
- Lowest (blue): the temp is 118.4-122℉, warm, for long time use and temp buffering

Important directions for use:
- When connecting it to a power source, the button will flicker quickly then go out. Next, you need to turn it on by long pressing the button for 2s. It starts at preheating, 5 mins later it can reach a top temp
- You can change the heat setting at any time by short pressing the button once
- Turn it off, please long press the button for 2s
- Please note people with pacemakers are forbidden to use the heating pad
- Wash it gently by hand in clean water