{"type":"firestarter.listing","listing":{"id":"lst_34hkxXDp","product_name":"Open Box Fosi Audio K5 PRO Mini Stereo Gaming DAC & Headphone AMP","category":null,"description":"Our open box products, used exclusively for unboxing videos, are original and unworn, available at a surprise discount price. Only one of each type in stock—first come, first served. Purchase now for immediate shipping.\nFeatures: -\nThe K5 PRO is a mini stereo gaming DAC headphone amplifier with microphone, supporting usb Type-C，optical and coaxial digital inputs, 3.5mm headphone jack, and RCA outputs, suitable for most home audio systems. With treble and bass control, it can be used as a preamplifier or volume control for PC/Mac. Fosi Audio K5 PRO DAC ensures exquisite muslcallty, accurate and realistic phasing, and reproduction of the original sound! We offer 24-month warranty, and friendly customer service!\n \nHighlight: -\n>Model: K5 PRO\n>Input : USB Type-C, Optical, Coaxial, Microphone\n>Output : 3.5mm Headphone, RCA\n>PC-USB supports input sampling rate: Up to 24Bit/96kHz\n>Optical/Coaxial supports input sampling rate: Up to 24Bit/192kHz\n>RCA Output Level: 2V\n>Powe Supply:5V\n>Power Input Interface: USB Type-C\n>THD: <0.003%\n>SNR: ≥110dB\n>Frequency response: 20Hz-20kHz (±3dB)\n>PC-USB support operating system: XP/W7/W8/W10/MAC/linux\n>Distortion: 0.001%;\n>Amp output maximum power: 1000mw/16Ω, 500mw/ 32Ω, 300mw/64Ω, 150mw/128Ω, 80mw/300Ω\n>Headphone matching impedance: 16-300Ω\n>Size (L*W*H): 4.4*3.7*1.2inch (112*95*30mm)\n>Net Weight: 0.551b/251g\n \nPackage Include: -\n*1x Fosi Audio DAC-K5 PRO\n*1x 2-in-1 USB Type-A/C to Type-C Cable\n*1x Optical Cable\n*1x 3.5mm Headphone Splitter\n*1x User’s Manual\n \n\n\n\n\n\n\n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-open-box-fosi-audio-k5-pro-only-ship-within-us-247237.jpg?v=1732835758","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-707649.jpg?v=1732835877","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-988294.jpg?v=1732836106","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-980358.jpg?v=1732835662","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-160389.jpg?v=1732836011","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/open-box-fosi-audio-k5-pro-mini-stereo-gaming-dac-headphone-amp-hifigo-311893.jpg?v=1732836082"],"price":67.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:29.315Z"},"share_url":"https://firestarter.network/l/lst_34hkxXDp","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer ","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_34hkxXDp' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Open Box Fosi Audio K5 PRO Mini Stereo Gaming DAC & Headphone AMP' and a budget_max comfortably above $67.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}