EC21 Product Catalogs - c arm x ray machine http://www.ec21.com/ec-market/c arm x ray machine.html Biofirst patchhttp://cleanhitec.en.ec21.com/Biofirst_patch--3450226_452336.htmlC) 0.912 3.52 x 10 2 Measured by the Korea Far Infrared Ray Association as the official test organization 20080422