{"type":"firestarter.listing","listing":{"id":"lst_M9Olx98m","product_name":"DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid Earphone","category":"Earphone","description":"\n\nFunction: For Mobile Phone\n\n\nFunction: Monitor Headphone\n\n\nFunction: HiFi Headphone\n\n\nFunction: Sport\n\n\nFunction: Common Headphone\n\n\nWaterproof: No\n\n\nActive Noise-Cancellation: Yes\n\n\nSupport Memory Card: No\n\n\nConnectors: 3.5mm\n\n\nLine Length: 1.2m\n\n\nFrequency Response Range: 5-40000Hz\n\n\nControl Button: No\n\n\nPlug Type: L Bending\n\n\nVocalism Principle: Hybrid technology\n\n\nSensitivity: 112dB\n\n\nWireless Type: None\n\n\nSupport APP: No\n\n\nModel Number: DK4001\n\n\nStyle: Ear Hook\n\n\nResistance: 32Ω\n\n\nWith Microphone: No\n\n\nBrand Name: Dunu\n\n\nCommunication: Wired\n\n\nIs wireless: No\n\n\nVolume Control: No\n\n\nFeature: FeaturePatented self-locking quick replaceable plug\n\n\nMaterial: Zirconium alloy liquid metal\n\n\ncable: Single crystal copper and pure silver mixed braided cable\n\n\nFeature2: Customize the SpinFit earbuds\n\n\n                    ---SpecificationsSplit--- Accurate and Exquisite Full Frequency Performance Hybrid system, high performance of 13mm beryllium diaphragm dynamic, with 4 high frequency/ ultra-high frequency balanced armature drivers.  Beryllium Diaphragm Dynamic Driver The newly developed beryllium diaphragm dynamic driver, with a diameter of 13mm, brings accurate low-frequency reduction and rich medium-frequency details, allowing players to experience unprecedented extremely low-frequency response and strong acoustic performance.  Knowles Balanced Armature Driver Four Knowles currently high-end high-frequency and ultra-high frequency balanced armature drivers achieved accurate high-frequency and ultra-high frequency reduction, greatly improve the density of audio and ultra-high frequency, and show natural and exquisite sound.  Zirconium Alloy Liquid Metal The precision machined of liquid zirconium alloy cavity can greatly reduce the weight of the cavity, but at the same time, the strength of the cavity reaches three times of stainless steel to effectively suppress harmonic resonance, and the acoustic performance is outstanding.  Air Charging Loop System -A.C.I.S The uni","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/dunu-dk4001-hifi-audio-hi-res-beryllium-pvd-5driver-hybrid-earphone-earphone-hifigo-978686.jpg?v=1656775029"],"price":899,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.905Z"},"share_url":"https://firestarter.network/l/lst_M9Olx98m","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_M9Olx98m' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid Earphone' and a budget_max comfortably above $899.00 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."]}}