HealFast Therapy PetPatch Loop Relieves Pain and Reduces Swelling from Acute Wounds or Sprains and Chronic Conditions Like Arthritis Drug-free treatment for pain and swelling from sprains, strains, injuries and conditions like arthritis and hip dysplasia. Light, flexible loop antenna design with integrated push button on/off switch delivers award-winning ActiPatch shortwave therapy for your pets or horses. Therapy lasts for 720 hours and a push button on/off switch extends the life when not in use. New technology enhancements have made this product lighter and more cost-effective. Relieves joint, muscle and tendon pain Reduces swelling and inflammation Improves mobility, Accelerates healing of wounds, incisions, and bruises. Has no contra-indications or side-effects.