{"product_id":"used-open-box-fiio-m21-dap","title":"Used \/ Open-Box FiiO M21 DAP","description":"\u003csection\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\n\u003cp\u003eThe FiiO M21 is a compact Android digital audio player for listeners who want a self-contained portable source instead of depending on a phone dongle. It can serve as a pocket DAP, a USB DAC, a Bluetooth receiver, or a transport into another DAC, with 3.5 mm and 4.4 mm output options for common portable headphones and IEMs. HiFiLoop uses this page for private used \/ open-box quote requests and model matching.\u003c\/p\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAndroid 13 player platform with Qualcomm Snapdragon 680, 4GB RAM, 64GB storage, and microSD expansion support.\u003c\/li\u003e\n\u003cli\u003eFour CS43198 DAC chips with a balanced output architecture and both 3.5 mm and 4.4 mm headphone \/ line output paths.\u003c\/li\u003e\n\u003cli\u003eMultiple working modes including Android, Pure Music, AirPlay, USB DAC, and Bluetooth Receiving.\u003c\/li\u003e\n\u003cli\u003eLocal decoding up to 384 kHz \/ 32-bit and DSD256, with USB audio support up to 768 kHz \/ 32-bit and DSD512.\u003c\/li\u003e\n\u003cli\u003eDual Type-C layout, 4.7-inch screen, Bluetooth 5.0, Wi-Fi functions, and portable \/ desktop-friendly power behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eFiiO M21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003ctd\u003eAndroid DAP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardware platform\u003c\/th\u003e\n\u003ctd\u003eQualcomm Snapdragon 680; CS43198 x4 DAC; OPA1692 x2 + SGM8262-2 x2 amplifier stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem \/ memory\u003c\/th\u003e\n\u003ctd\u003eAndroid 13; 4GB RAM; 64GB internal storage, about 52GB available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003e4.7-inch 750 x 1334 screen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e3.5 mm PO\/LO\/coax shared output; 4.4 mm balanced PO\/LO shared output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum format support\u003c\/th\u003e\n\u003ctd\u003eLocal playback up to 384 kHz \/ 32-bit and DSD256; USB Audio up to 768 kHz \/ 32-bit and DSD512\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery life test\u003c\/th\u003e\n\u003ctd\u003e3.5 mm output: 15 hours; 4.4 mm output: 12.5 hours, under FiiO 32 ohm MP3 test conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput power reference\u003c\/th\u003e\n\u003ctd\u003e4.4 mm: L+R \u0026gt;= 950 mW + 950 mW at 32 ohms, THD+N \u0026lt; 1%, Super High Gain mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions \/ weight\u003c\/th\u003e\n\u003ctd\u003eAbout 68 x 121 x 17 mm; about 193 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eSeries \/ category notes\u003c\/h2\u003e\n\u003cp\u003eM21 belongs in FiiO's M-series digital audio player line and is classified here as an Android DAP, separate from DAC\/amp dongles, IEMs, headphones, and accessories.\u003c\/p\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eCondition \u0026amp; availability\u003c\/h2\u003e\n\u003cp\u003eReference page only. This is a used \/ open-box reference listing. Final pricing, condition, accessories, and availability are confirmed case by case. HiFiLoop checks functional status, cosmetic condition, included items, version details, known limitations, and current photos before transaction.\u003c\/p\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eShipping \u0026amp; support\u003c\/h2\u003e\n\u003cp\u003eAfter confirmation, typical processing is 3-5 business days. Typical international shipping is 7-15 days, with free shipping over $199. HiFiLoop provides 14-day DOA support and a repair path from day 15 to day 180; return shipping, taxes, and duties may be the buyer's responsibility.\u003c\/p\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does Reference price mean?\u003c\/h3\u003e\n\u003cp\u003eReference price is for price context only. Availability and final quote are confirmed manually before payment.\u003c\/p\u003e\n\u003ch3\u003eIs this exact unit ready to ship?\u003c\/h3\u003e\n\u003cp\u003eNot automatically. Manual availability check required.\u003c\/p\u003e\n\u003ch3\u003eCan HiFiLoop help me find another unit?\u003c\/h3\u003e\n\u003cp\u003eYes. New or like-new options can be checked on request.\u003c\/p\u003e\u003c\/section\u003e","brand":"FiiO","offers":[{"title":"Default Title","offer_id":48308556202198,"sku":null,"price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/SKU__1_9a3ec2dd-4d76-44df-9ba5-37ad7e914e5a.png?v=1780369258","url":"https:\/\/www.hifiloop.com\/zh\/products\/used-open-box-fiio-m21-dap","provider":"HiFiLoop","version":"1.0","type":"link"}