Monoprice 601045 1/8 Inch TRS Male to Dual 1/4 Inch TS Male Cable - 5 Feet-
It features a 3.5mm (1/8") TRS plug on one end and a pair of 1/4" TS plugs on the other. The connector heads of the TS plugs are color coded red and gray to identify the right and left channels respectively.