3.5mm Mono to BNC Adapter, BNC Female Jack to 3.5mm TS Male Plug, Gold Pated Bidirection Connector, SDI Coaxial Cables Adaptor for CCTV Surveillance Camera DVI DAB CB Radio Antenna : Electronics - Amazon.com
3.5mm Mono to BNC Audio Adapter, BNC Female Jack to 1/8" TS Male Plug Nickel-Pated Bidirection Connector for Antenna Radio CCTV DVR Camera and More (4 Pack) : Amazon.ca: Electronics