The Karbonn A21 and CB3 Audio CB3 Hush Wireless have 1 common Bluetooth A2DP audio codec (SBC). The Karbonn A21 supports 1 codec (SBC). The CB3 Audio CB3 Hush Wireless supports 1 codec (SBC).
| Codec | Karbonn A21 Details | Change |
CB3 Audio CB3 Hush Wireless Details | Change |
|---|---|---|
| aptX LL | No | No |
| aptX HD | No | No |
| LDAC | No | No |
| AAC | No | No |
| UHQ | No | No |
| aptX | No | No |
| SBC | Yes | Yes |
| Bluetooth Version | 2.1 | 4.0 |
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