This device offers continuous and pulsed applications, intended to generate deep heat within body tissues for the treatment of selected medical conditions such as muscle spasms, joint contractures, and pain relief which has the advantage of a greater penetration depth in contrast with conventional methods, such as hot packs, baths or infrared light. Its direction-adjustable arms enable comfortable treatment of each body part. And it is suitable for use in out-patient clinics, hospitals, and other facilities.