this tens unit is great. I wanted one without the wires . I had already bought one of these previously for my husband who is a truck driver. He told me it was great so i decided to buy one and give it a try. It works great for my lower back issues. I love the different settings it has. I also like that i can wear it and don't have to worry about the long wires. The long pad is a great plus. Thank you for this tens unit. It is great.