The Joint Pain Relief Handheld Cold Laser Therapy Devicecombines 650nm and 808nm cold laser beams with maximum 510mW to deliver photons to the injured cells. The cells are then stimulated and respond with a higher rate of metabolism, and utilize the photons to produce an energy molecule known as ATP. ATP is needed by cells to perform various tasks in the body like better blood circulation, anti-inflammation, pain relief and acceleration of the healing process.