Most users notice reduced morning stiffness within the first 7–10 days of consistent daily use. By week 3, many describe meaningful improvement in pain levels. Results vary — some feel it sooner, some need 4–5 weeks. Consistency matters more than anything else.

Yes. The K-PRO fits both left and right knees. If you have a 2-pack, you can use both simultaneously. If you have a 1-pack and need both knees treated, do 20 minutes on one knee then swap to the other.

Yes — that's exactly how most people use it. The device is fully wireless and cordless. Sit on the couch, lie in bed, or recline in a chair. The only requirement is that your knee is relatively still during the session.

Yes. Daily use is recommended for the first 8 weeks of the protocol. Red light therapy at these wavelengths is well-studied and considered safe for regular use. If you experience any unusual discomfort, reduce heat level or session duration.

Start at Level 2 for your first session. If comfortable, move to Level 3 from session 2 onward. Most regular users settle at Level 3–4. Level 5 is for experienced users and should not be used for more than 15 minutes at a time.

Start with Mode 1 (660nm) for the first 2 weeks. Add Mode 2 (850nm) in weeks 3–4. From week 5 onward, use Mode 3 (both) for maximum benefit. Mode 3 is the most comprehensive and recommended for ongoing use.

First, charge for at least 30 minutes and try again. If still unresponsive, hold the power button for 5 seconds. If the issue persists, email us at support@athrx.store with your order number and we'll replace it immediately.

Consult your physician before using the K-PRO if you have metal implants, a pacemaker, or other implanted medical devices. The K-PRO is not intended to diagnose, treat, cure, or prevent any disease.