red light therapy device can be suitable for most parts of the body NECK SHOULDER KNEE BACK 2 wavelengths of light work together to protect your body Gifts Suitable for Any Holiday for family or friends.It is suitable for both men and women. Regardless of whether it is young or old, the red light treatment panel can provide some help. ☀How to use: Place on body and secure straps. Plug into a electrical outlet. Press on/off switch to activate device. You can only see the red LED's; the others are in the Infrared light spectrum and can't be seen with our eyes. Auto-off time is 20 minutes and can be used multiple times per day. ☀Features: ✔360 Medical grade LED lights ✔Near-infrared LEDs appear unlit because they're invisible to naked eye. However, they are just as powerful as the red light and penetrate body deeper. ☀Note: 1. Use light area: LED red light equipment can be applied to any part of the body, except the eyes. 2. Please make sure your skin is cool and dry when using the lights wrap