The Apple Watch Series 3 Aluminum supports 2 codecs (AAC, SBC). The Xiaomi Redmi S2 supports 5 codecs (aptX HD, LDAC, AAC, aptX, SBC).
| Codec | Apple Watch Series 3 Aluminum Details | Change |
Xiaomi Redmi S2 Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | Yes |
| LDAC | No | Yes |
| AAC | Yes | Yes |
| UHQ | No | No |
| aptX | No | Yes |
| SBC | Yes | Yes |
| Bluetooth Version | 4.2 | 4.2 |
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