muscle heat massager for pain management and enhanced recovery (for back pain, neck pain, knee pain, shoulder pain, foot pain etc) ufp heat muscle massager is a modality that has been used since the 1940s. heat massager is applied using the head probe that is placed in direct contact with your skin via a transmission coupling gel. heat muscle massager has been shown to cause increases in: healing rates tissue relaxation tissue heating local blood flow scar tissue breakdown. technical specifications - frequency : 1 mhz, output : 15 acoustic, head : 3.0 watts/cm2 treatment time : 0-30 min modes: continuous and pulse waves. available voltage: 110v/220v main unit : 01 qty. applicator :01 qty. power cord :01 qty instruction manual :01 no