3.5mm Mono Male to RCA Female Adapter: Connect Your RCA Devices to Your 3.5mm Mono Port. The 3.5mm Mono Male to RCA Female Adapter is the perfect solution for connecting your RCA devices to your 3.5mm Mono port. This adapter is easy to use and requires no additional drivers or software. Simply plug the 3.5mm male connector into your device and the RCA female connector into your RCA cable. This adapter is compatible with a wide range of devices, including: Speakers, Subwoofers, Home theater systems, DJ equipment, Portable audio players