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Learn about the different versions of Bluetooth.
What Is the Latest Bluetooth Version?
The latest version of Bluetooth is 5.3. Bluetooth Core Specification Version 5.3 added feature enhancements regarding LE reliability when communicating with devices far away, encryption key length negotiation, LE periodic advertising, and faster switching between connection speeds.
Bluetooth Low Energy (LE) Audio and Isochronous Channels allow for sharing and broadcasting audio and include hearing aids.
Bluetooth LE Power Control automatically adjusts transmitter power level based on a receiver's signal level.
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What Does Each Bluetooth Version Support?
Major Changes in Each Bluetooth Version
Bluetooth Version Major Features and Improvements
Minor enhancements regarding:
LE reliability when communicating with devices far away
Encryption key length negotiation
LE handling of periodic advertisements
Support for faster upgrading of connection speeds
Bluetooth Low Energy Audio provides support for audio with reduced power consumption Bluetooth LE Audio also supports:
Isochronous Channels which allow for
sharing and broadcasting audio A new
LC3 codec made specifically for LE
Hearing aids LE Power Control
automatically adjusts transmitter power levels based on a receiver's signal level
Bluetooth Mesh which allows for many-to-many communications
Angle of Arrival (AoA) and Angle of Departure (AoD) allow for tracking the position of devices
LE 2 Mb/s colocated connection
LE Long Range
LE Channel Selection Algorithm
Slot Availability Mask (SAM) for avoiding nearby LTE transmission frequencies
Higher Output Power
Starting in version 5, the naming scheme changed to not include the point number in major versions.
Internet of Things (IoT) related features such as Internet Protocol Support Profile (IPSP) v6 Low Energy Secure Connection
Improved privacy with Extended Scanner Filter Policies Extended Data Packet Lengths for LE
Co-existence support for LTE, for reduce interference
Audio Architecture Updates for
HD voice quality Fast Data Advertising Interval
Limited Discovery Time
An entirely new stack called
Bluetooth Low Energy was built to target very low power applications powered by a watch battery.
data transfers of up to 24 Mb/s using a colocated 802.11 (Wi-Fi) link. Note that HS is an optionally supported feature. Enhanced Power Control
improves power management and fixes some headset link loss issues
Enhanced Retransmission Mode (ERTM) for L2CAP supports retransmission and flow control, and a low-latency Streaming Mode (SM) support neither. Unicast Connectionless Data for small amounts of service data without an L2CAP channel
Improved pairing security and experience with Secure Simple Pairing (SSP).
In previous versions, encryption wasn't required and could be turned off, and usage of expired keys could be easily attacked.
Starting in 2.1:
Encryption is required for most connection types Encryption keys must be refreshed
Enhanced Data Rate (EDR) allowing for
data transfer up to 2.1 Mb/s. Note that EDR is an optionally supported feature.
Faster connection and discovery
Adaptive frequency-hopping to avoid interference on crowded frequencies
Retransmission of corrupt packets with Extended Synchronous Connections (eSCO) Faster
transmissions speeds of up to 721 Kb/s Host Controller Interface (HCI) three-wire UART
Flow Control and Retransmission Modes for L2CAP
Recieved Signal Strength Indicator (RSSI) Various interoperability problems from 1.0b were fixed
The initial release of Bluetooth
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Which Version of Bluetooth Is My Windows 10 Computer Using?
You can find your Bluetooth version by going to the Windows Device Manager and opening the properties for your Bluetooth device.
The first step is to open the Windows device manager, which you can do by
searching Windows (Windows Key + S) for Device Manager and opening it.
Bluetooth in the list and click to expand to see more.
You'll want to look for whichever
Bluetooth device/hardware you're using.
USB adapters are typically listed as
Bluetooth (model #) USB Device.
Right-click on that and select
Device manager properties for Bluetooth device on Windows 10
Go to the
Look for the
Firmware Version starting with LPM. This number correlates to the Bluetooth version that your computer supports.
Link Manager Protocol Version
Supported Bluetooth Version
LPM 5 and below
Bluetooth version 3 or less (Typically not used or is deprecated)
LPM number for Bluetooth device for Bluetooth version on Windows 10
Recommended Bluetooth Adapter: TP-Link UB500
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