Importer520 2 Packs Optical 3.5mm Female Mini Jack Plug To Digital Toslink M Audio Adapter Premium High Quality Optical Toslink Gold Plated Connector Connector: Toslink male &gt; 3.5 mm female Used for connecting devices with Toslink interface like amplifier, Blu-ray player etc. Gold Plated Ferrule Prevents Corrosion And Provides For Maximum Protection Of The Fiber Tip. Dust cap protects connector from contamination when not in use.