{"type":"firestarter.listing","listing":{"id":"lst_2v06rZWg","product_name":"FiiO M21 Portable High-Res Lossless Music Player","category":"DAP (Digital Audio Player)","description":"FiiO M21 Portable High-Resolution Music Player\nThe FiiO M21 is a compact digital audio player designed for music lovers who want portable high-fidelity playback. Powered by a Snapdragon 680 processor and running Android 13, it blends modern performance with thoughtful audio engineering. Featuring four CS43198 DAC chips, balanced amplification, and dual USB-C ports, it brings clarity and versatility to listening both at home and on the go.\nQuad DAC Power for Clean, Dynamic Sound\nThe M21 houses four CS43198 DAC chips in an eight-channel fully differential configuration. This design enhances dynamic range, lowers noise, and delivers precise, interference-resistant playback.\nDual-Stage Balanced Amplification\nWith a two-stage amplifier circuit, the M21 ensures strong voltage drive and stable current output. This balance makes it capable of handling both sensitive in-ear monitors and power-hungry full-size headphones.\nDesktop or Portable Power Modes\nSwitch between portable and desktop-grade performance. The M21 supports dual power supply modes, letting you enjoy efficient portability or tap into higher-powered output when docked.\nDual Type-C Ports and Low Jitter Output\nTwo USB-C ports provide flexibility for charging and data connections, while the low-jitter coaxial output ensures accurate digital signal transmission for external DACs.\nCompact Display with Intuitive Interface\nA 4.7-inch HD screen provides clear navigation and album artwork display, offering both portability and ease of use without compromising visibility.\nProduct Highlights\n\n4× CS43198 DAC chips with a fully differential design\nDual-stage amplifier for balanced output\nDual power supply modes: portable and desktop\nDual Type-C ports for charging and data\nLow-jitter coaxial digital output\n4.7-inch compact HD display\n3.5mm and 4.4mm headphone/line-out jacks\nProtective case\n\nSpecs\n\nProcessor: Snapdragon 680, 6nm\nOperating system: Android 13\nDAC: 4× CS43198\nOutput power: up to 950mW\nOutputs: 3.5mm single-ended","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611311.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611308.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611310.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611306.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611309.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611307.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1193607672.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1193607675.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1193607674.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611315.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611314.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611313.jpg?v=1770989493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-dap-digital-audio-player-fiio-m21-portable-high-res-lossless-music-player-1209611312.jpg?v=1770989493"],"price":399.99,"currency":"USD","in_stock":true,"inventory_qty":29997,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:57.306Z"},"share_url":"https://firestarter.network/l/lst_2v06rZWg","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 <your Firestarter API key>","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_2v06rZWg' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy FiiO M21 Portable High-Res Lossless Music Player' and a budget_max comfortably above $399.99 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."]}}