The NIU Tek 4D2 and Huawei FreeBuds have 1 common Bluetooth A2DP audio codec (SBC). The NIU Tek 4D2 supports 1 codec (SBC). The Huawei FreeBuds supports 2 codecs (AAC, SBC).
| Codec | NIU Tek 4D2 Details | Change |
Huawei FreeBuds Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | No |
| LDAC | No | No |
| AAC | No | Yes |
| UHQ | No | No |
| aptX | No | No |
| SBC | Yes | Yes |
| Bluetooth Version | 4.0 | 4.2 |
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