This is the rechargeable back massager that targets the lumbar muscles with a soothing Shiatsu massage. Its ergonomic shape makes it ideal for use on recliners, desk chairs, or in a car, and its cordless design allows it to provide relief without requiring proximity to a power outlet. The massager employs a pair of rotating nodes that work together to provide clockwise or counterclockwise directional massages. It has three massage modes and two heat settings that aid in pain relief and circulation. With an elastic strap that secures it around most chairs. Charges via AC. 15 3/4" L x 14 1/2" W x 4 3/4" D. (3 lbs.)