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