5.0 (backward compatible with 4.2, 4.1, and 4.0).
Without more context, these interpretations are purely speculative. If you have a specific meaning or context in mind for "xfw bt," I'd be happy to try and assist further! xfw bt
Lossless decoding (supports WAV, APE, FLAC, MP3). Range: Approximately 15 meters in open space. 5.0 (backward compatible with 4.2
: Typically powered via Micro USB (5V) or a 3.7-5V lithium battery. Audio Performance and 4.0). Without more context