Lot of 3 × D21 Hi-Fi Audio Stereo In-Ear Earphones

Updated August 15, 2026

Lot of 3 × D21 Hi-Fi Audio Stereo In-Ear Earphones (Sports Bass / Powerful Bass Blast) Brand-new, sealed black wired stereo earphones. Colors May Be BLACK, WHITE or Assorted. Key Features In-ear design with silicone tips Powerful bass / “Sports Bass Blast” tuning Built-in microphone + inline remote (call answer/end, music play/pause, track skip) 3.5 mm stereo plug 10 mm drivers Frequency response: 20–20,000 Hz Sensitivity: ˜95 dB ±3 dB Impedance: 16 O ±15% Cord length: 1.2 m Suitable for music, calls, gaming, and sports

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