Aurum Cables 10-Pack 3.5mm Male Mono Plug to 3.5mm Female Stereo Jack Adapter Convenient and cost-effective 10-pack 3.5mm (1/8 inch) Mono Plug (Male) to 3.5mm (1/4 inch) Stereo Jack (Female) Adapter Perfect for a 3.5 mono port to accept a standard stereo cable with 3.5mm plug Connect Headphones or Microphones with 1/4 inch plugs to Audio devices with a 1/8 inch jack Makes your favorite headphones or other devices compatible with most pro audio and home audio equipment! 360 degree grip treads help easy plugging and unplugging