Got this fory best friend as she's got knee pain...A herbalist and alternative therapist friend worked on her knee while we were camping and within 20 minutes about 70% of the swelling had dissipated. If I hadn't witnessed it I would have found it difficult to believe...not that bit worked but that it worked so quickly. So she asked me to purchase a massager in a case with as many adapters as I could find... it's even on her colour pattet of favourite colours too. It's got a good feel to it 👍