The MOST AMAZING BACK MASSAGER. 100% Worth the buy. I suffer from back pain everyday and get knots in my shoulders from working out. So I have tried several other electronic messages for my back that didn’t help. This little massager has exceeded my expectations!! I have it on my back throughout the day and while working! It’s also great to use on your neck while laying down. I don’t normally do reviews but I had to share how amazing this product is to others who also suffer from back pain, shoulder and neck aches on a daily basis!