{"type":"firestarter.listing","listing":{"id":"lst_q5MgZ8mO","product_name":"Shanling UP4 2022","category":"AMP & DAC","description":"\n\n\nThe continuation of Shanlings design classics and long battery life\nUP4 2022 continues the classic design of the Shanling family with simple lines, light and thin volume,fresh and moisturizing elegant and pure body with golden rollers in laid in it adding dignity to the elegance of the Shanling family gently rotating enjoy a great listening experience. UP4 2022 comes standard with Shanling’s second generation independent back clip,with increased thickness and improved toughness so you can take care of your UP4 360 degrees. UP4 2022 is equipped with a large 540 mAh battery,charging for 2 hours, listening for a whole day about 300 hours long standby, guarding your HiFi journey.\n\n\n\n\n\nDual ES9219C DAC\nThe UP4 2022 is equipped with two deeply developed ES9219C chips as the core DAC.The heat generation is stably controlled while the power consumption is low.The resolution and restoration power are convincing,and the strong output power presents excellent warm sound quality.\n\n\n\n\n\nBluetooth 5.0+2.5mm/3.5mm Adaptations\nUP4 2022 adopts Bluetooth 5.0version supports LDAC/LHDC/aptX HD/aptX LL/aptX/AAC/SBC full-format Bluetooth encoding protocol provides stable and smooth Bluetooth transmission,and bid fare well to delay.The corresponding lights are different under different protocols and you can enjoy a free and intelligent experience. The UP4 2022 is equipped with a 2.5+3.5 mm dual interface In the balanced output mode, the dual ES9219C DAC burst out synchronously, and the left and right separation, sound field performance, and signal output are getting better and better. UP4 2022 is equipped with mainstream Type-c usB interface, supports USB DAC, mobile phone, computer, tablet, TV, car audio and other equipment, easy to connect.\n\n\n\n\n\nMultiple modes\nHigh-gain, low-gain, dual DAC booster switch freely, two built-in filters, and explore the good news in multiple modes. Choose different digital filters,ES9219C DAC will use different algorithms for digital-to-analog conversion ","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/products/03_0f0e6d1d-3aaa-4a73-86e5-a25d9f8aa3eb.jpg?v=1661417007","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/05_b15007a9-5b9a-493c-b4b2-7b132164ce8b.jpg?v=1661417007","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/3_dad27454-a045-446a-89bf-c7bd2d3db2f9.jpg?v=1661417008","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/IMG_7644.jpg?v=1661417013","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/IMG_7649.jpg?v=1661417024","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/IMG_7627.jpg?v=1661417053","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/06_b075dd15-87d2-499b-8f43-f30f655712b6.jpg?v=1661417074","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/04_4079705f-65a4-4099-9406-38607d19d003.jpg?v=1661417079","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/01_e30718c1-7db0-4971-9b4c-df0003d8eb1f.jpg?v=1661417089","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/4_d0a207f9-1100-47e7-a176-fa1b435d8fac.jpg?v=1661417111"],"price":89,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:47.303Z"},"share_url":"https://firestarter.network/l/lst_q5MgZ8mO","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_q5MgZ8mO' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Shanling UP4 2022' and a budget_max comfortably above $89.00 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."]}}