Microdigit Black edition Earplug | DEP354BImmersive Music 14.2mm High Resolution Speaker, Support Stereo Dual Channel, Enjoy Lossless Sound. Low Latency Stable & Instant, BT 5.0 Chip, Stable Connection, High-Fidelity Transmission, No Stuck or Disconnection. Upgraded Touch Control, Support Left, Right, Or Both Earbuds, Enjoy Wonderful Music.