I work long shifts at a warehouse lifting and moving heavy equipment and for a really long time I suffered from chronic lower back pain. Then one day I heard about Smart Relief Ultimate Tens massager and powered muscle stimulator and my life was forever changed. This device really does an amazing job at providing temporary relief of sore and aching muscles in the body. I use it in the morning while I enjoy my coffee, at work during lunch, and any other chance I get. Now I look forward carrying my kids up to bed every night and living a pain-free life. Thanks Smart Relief!