Cable Matters 10-Pack, Gold Plated 3.5 mm Stereo Audio Coupler 10-pack 3.5mm stereo couplers are used to connect two stereo cables together to make a longer cable Convenient and cost-effective 10-pack stereo couplers provide spare or replacement couplers to use on different audio systems Gold-plating resists corrosion and ensures minimal signal loss 360 degree grip treads help easy plugging and unplugging At home to connect a phone to a sound system At work to extend an audio cable from a VGA display In the car to connect to a car stereo aux port from the back seat