Functions: Quickly relieve various pains associated with Quickly relieve various pains associated with muscle strain, neck pain,Rheumatism; rheumatic arthritis, hyperostosis, knee joint ache, tenosynovitis, strain & sprain, sciatica, fibromyalgia. (necessary for office workers, popular in hotweather and warm areas). (necessary foroffice workers, popular in hot weather and warm areas). Specification: 20,30,40,50pcs Validity: 2Years Usage method: -Clean and dry affected area -Remove the plastic backing from one side of the patch. -Smooth that side over the area where you want pain relief. After cleaning the skin, apply to the affected part or tenderness point. Each patch can use 8-12 hours, change the interval time is 12hours. One patch can only be used once。 Matters needing attention: please wash it down with clean water. 1. this product is only used for intact skin, not for skin damage; 2.skin Allergy banned, pregnant women with caution; 3. place where children can not touch; 4. this product is for external use only. 5. The body is equipped with a pacemaker and cannot be used.