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Bluetooth Versions Explained: 4.0 to 5.3

Tap a version to see what changed.

Bluetooth 4.0

The version that introduced Bluetooth Low Energy (BLE), dramatically cutting battery use and helping popularize wearable devices.

Bluetooth 4.2

Improved data transfer speed and security, making it better suited for Internet of Things (IoT) device connections.

Bluetooth 5.0

Up to 4x the range and 2x the speed of the previous version — the standard used in most current smartphones and earbuds.

Bluetooth 5.2 (LE Audio)

Introduced LE Audio, which can stream audio to multiple devices at once, improving both sound quality and battery efficiency.

Bluetooth 5.3

The latest version, with further improvements to connection stability and power efficiency, found in the newest wireless earbuds and smart devices.

Check the version before you buy earbuds

Bluetooth version directly affects connection stability, transfer speed, and battery efficiency. Checking the Bluetooth version listed in a new wireless earbud or speaker's specs lets you gauge its performance before buying.

Frequently Asked Questions

Can devices with different Bluetooth versions still connect to each other?

Yes — Bluetooth is backward compatible, so devices with different versions can still connect, but the connection will run at the performance level of the lower version.

Does a higher Bluetooth version always mean longer battery life?

Newer versions generally improve power efficiency, but actual battery life still depends heavily on the device's own battery capacity and how it is used.