The Apple Watch Series 2 42mm and QCY QY19 have 1 common Bluetooth A2DP audio codec (SBC). The Apple Watch Series 2 42mm supports 2 codecs (AAC, SBC). The QCY QY19 supports 2 codecs (aptX, SBC).
| Codec | Apple Watch Series 2 42mm Details | Change |
QCY QY19 Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | No |
| LDAC | No | No |
| AAC | Yes | No |
| UHQ | No | No |
| aptX | No | Yes |
| SBC | Yes | Yes |
| Bluetooth Version | 4.0 | 4.1 |
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