Bluetooth 5.0 vs 5.3 vs 5.4 vs 6.0: What Each Version Actually Changes
What changed in every Bluetooth version since 5.0, what LE Audio and Auracast mean, why both devices must support a feature, and when the version number matters for headphones.
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Versions at a glance
| Version | Year | What it added |
|---|---|---|
| 5.0 | 2016 | For Bluetooth Low Energy (LE): up to 2× speed (2 Mbps mode), up to 4× range (Coded PHY) and much larger broadcast messages |
| 5.1 | 2019 | Direction finding (angle of arrival/departure) for more precise location, e.g. item trackers and indoor positioning |
| 5.2 | 2020 | Foundation of LE Audio: isochronous channels, the LC3 codec, and EATT for better efficiency |
| 5.3 | 2021 | Efficiency and reliability tweaks: connection subrating, channel classification, less interference |
| 5.4 | 2023 | Periodic Advertising with Responses (PAwR), aimed at electronic shelf labels and large sensor networks, plus encrypted advertising data |
| 6.0 | 2024 | Channel Sounding for centimetre-level distance measurement between devices, useful for find-my features and digital keys |
What LE Audio and Auracast mean for you
LE Audio moves audio onto Bluetooth Low Energy with the new LC3 codec, which keeps quality good at lower bitrates and can improve battery life. It also enables native hearing-aid support and multi-stream audio for true wireless earbuds.
Auracast is LE Audio's broadcast feature: one source (a TV, an airport gate, a gym screen) can stream to any number of nearby headphones. Like every feature, it needs support on both sides.
Range and speed: the real-world picture
The famous "4× range" of Bluetooth 5 applies to the long-range Coded PHY mode of Low Energy, used mostly by sensors and trackers. Headphones stream audio using other modes, so do not expect a pair of earbuds to work four times further away. Walls, bodies and Wi-Fi interference matter more than the version.
Does the version matter when buying headphones?
- Codec support decides sound quality: AAC suits iPhones; aptX and LDAC are found on many Android phones.
- Multipoint (connecting to phone and laptop at once) is a feature the maker chooses to include; it is not guaranteed by a version.
- LE Audio support is worth having for future-proofing and hearing-aid features.
- Anything from Bluetooth 5.0 up is perfectly fine for everyday listening.
Quick answers
Will Bluetooth 5.3 earbuds work with a 4.2 phone?
Yes. Bluetooth is backward compatible; the connection simply uses the features both devices share.
Can I upgrade my phone's Bluetooth version?
Not really. The version depends on the radio chip; software updates occasionally add features, but cannot change the hardware.
Can I add newer Bluetooth to a PC?
Yes, with a USB Bluetooth adapter or by replacing a desktop's Wi-Fi/Bluetooth card.