''- Used with max 500 milliamps LEDs only - Used to converts 2 single function LEDs (max 500 milliamps) to dual function (dual 1157 style) - Same function as 513407 but requires less space; but works with LEDs with a maximum of 500 milliamps only - Comes with 2 single input power wires and 4 output wires to operate 2 light lights; giving them dual function - Run & stop; run & turn or high & low. - Works for taillights; signals; markers; fender tip lights; LED accent lighting or 2 x 25 Watt driving lights - Hard wired for universal applications - No heat build-up issues