The magnetic clip on pouch may be beneficial for back arm, shoulder, stomach and bladder problems. Inside is an incredibly powerful 3000 gauss magnet. To use the clip on pouch just clip inside clothing over the pain area with the magnet facing the skin. Can be worn day or night. Customer Letter: Dear Sir, I purchased the clip in pouch and used it on my elbow a night. I woke up to my first pain free morning since Christmas. I also use it on my waistband for back pain during the day and inside my shirt for neck pain at night sometimes. My friends have purchased a magnetic pillow, and wear the magnetic knee guards and all have found great relief with these products. Thank you. A happy customer Signed A Law.