Sound Professionals SP-ATEN-6 - 3.5mm (1/8 inch) male to 3.5mm (1/8 inch) male variable attenuator cable - can be used for mono or stereo SP-ATEN-6
3.5mm Line to 3.5mm Microphone Attenuator Cable for DSLR Camera/Recorder
Amazon.com: Movo MV-RC300 3.5mm TRS to TRS Line to Microphone Attenuator Cable (-25dB) with Headphone Monitoring for DSLR's, Zoom, Tascam, Mixers, and More : Musical Instruments