The HEAT Pain Pro HV-F311 combines both thermal and low-frequency therapies for drug-free pain relief. It has the same level of functionality as a clinical device, but was designed with a gentleness, ease of use and portability that makes it appropriate for use in home. It can provide thermal therapy (heat) and low-frequency therapy (low-intensity electric current) or alternate the two to help relieve pain and stiffness precisely where it is need. A rechargeable battery allows for use on the go, at work, or during travel, while the simple user interface and overall design ensure ease of operation.