{"type":"firestarter.listing","listing":{"id":"lst_ADxj1UcK","product_name":"Heartfield Orange","category":"Earphones/IEMs","description":"\n\nFour Independent Balanced Armature Drivers\n\"Orange,\" embodies the essence of wholehearted sincerity and the realization of aspirations, symbolizing a belief that has endured through hundreds of trials, unwaveringly adhering to its original purpose. Presenting the Heartfield Orange—a seamless evolution from the esteemed Star River Pro, enriched with its distinctive character. Immerse yourself in the pinnacle of audio precision with Heartfield Orange. Engineered to redefine your auditory experience, this exceptional earphone showcases a notable Driver Configuration, harnessing the prowess of Four Independent Balanced Armature Drivers. This advanced arrangement synergizes flawlessly to capture every auditory subtlety, yielding an unmatched Frequency Response spanning an expansive 20Hz to 20000Hz range.\n\n\nAssured Wearability and Ergonomic Design\nEnsuring a Confident Wearable Experience through Assured Wearability, our design finds its foundation in Headphone Cavity Ergonomics as Reference. This approach facilitates Enhanced Volume and Sound Isolation Universality, thereby Ensuring a Comfortable Fit for the Majority of Ear Shapes. The Casing is meticulously Crafted with Imported Resin Material, skillfully Balancing a Skin-Friendly Texture with Lightweight Durability.\n\n\n3.5mm gold-silver-copper hybrid braided headphone cable\nHeartfield Orange comes equipped with a standard 3.5mm gold-silver-copper hybrid braided headphone cable. This integration seamlessly combines premium oxygen-free copper with gold and silver wires, resulting in a sound experience characterized by balance and intricate detail. The cable's sheathing employs a supple, high-transparency material that not only guarantees comfort but also minimizes the stethoscope effect. This precise synergy, coupled with the distinctive 'Orange' audio quality and refined aesthetics, embodies a seamless convergence of sonic mastery and captivating visual charm.\n\n\n304 stainless steel\nHeartfield Orange employs a meticulous","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/1_ee6f40df-367e-41b6-8627-125974ec8d9f.jpg?v=1693281128","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/4_1.png?v=1693281189","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/2_1.png?v=1693281189","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/5_be192ff9-eea9-4d1b-8b45-e29fd52367cd.png?v=1693281190","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/5_1_1fa7e586-8e66-4346-869e-0d61280a7053.jpg?v=1693281190"],"price":389.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:46.833Z"},"share_url":"https://firestarter.network/l/lst_ADxj1UcK","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_ADxj1UcK' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Heartfield Orange' and a budget_max comfortably above $389.99 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."]}}