DR-HO'S® Replacement Two-Pair comes complete with two pairs of large replacement gel pads. Use the Large Flex Tone Pads for a deeper penetrating and more soothing massage. The extra deep relaxation effects will feel great on large muscle areas and relieve muscle tension, numbness, and pain. Features: Perfect for large muscle groups.Great for shoulder pain.Effective for wrist and arm pain.High-quality & reusable.Excellent for leg pain.Self-adhesive   Directions: Use them on your neck and shoulders, wrists and hands, back, legs, and ankles. Can be used up to 70-100 times. Recommend to spray water on gel pads before each usage. Do not pull on wire.   Caution: Do not use if pregnant or have a pacemaker.