Therapeutic Goods Administration (TGA) Approved. Modern_Science_for Muscle Pain Relief and Home_Acupuncture_Solutions. XFT-320 is a dual channels, battery-operated, low frequency massager. It can be used to relieve muscle pain in shoulders, back, waist, hands, foots, legs and other parts of the body. It comes with an electric acupuncture pen. The pen can be used to_stimulate the small part of body like the knuckle. Dual Channels_allow you to treat a larger area in one_application or multiple