【Red-Light】 - This portable red-light-therapy pain relief device has 44pcs 660nm red-light (visible) and 88pcs 850nm near-infrared-red-light (invisible).

【5 Modes】 - The light of P1 to P3 gradually increase. The light of P4 and P5 are the same as P3, but it turns into a flashing red light. The flashing frequency of P4 is fast, and the flashing frequency of P5 is slow. It is suitable for people who are more sensitive to red light. Power levels for different modes are: P1: 2W-P2: 3.3W-P3: 4.6W-P4P5: cycling from 2W to 3.3W to 4.6W.

【Heated Design】 - The knee massager uses a three-level heat and a yhree-level time function.

【Rechargeable Battery】 - The device for knee equipped a 5000mAh rechargeable battery that lasts 90-150 minutes on a full charge (depending on the level you use). Get rid of the hassle of charging cables and you can wear them anywhere with regardless of outlet constraints.

【3D Design】: This device fits the shape and curve of the knee. We have equipped two additional extension straps to make the device suitable for the knees of more than 95% of people, and it can be used on the shoulders with the extension straps.