PR009-P Replacement refill Pads details: • FDA approved formula. Proprietary technology. • Electric pulses evenly distributed. • Pain relief. Soothing effect. • A set of 4 • Retail packaging Skin applicable areas: neck and shoulders, back, waist, arms and legs, joints and ankles. A set of four, perfect for the Prospera PL029, PL009 TENS Electronic Pulse Massager and DL003 TENS Socks Combo. Compact, lightweight, easy to carry and use. Full retail packaging. Product Specifications • FDA approved • A set of four • Wire is trademark protected • Comes with full retail packaging • Dimension 3"x1.5"