Bluetooth Core 5.4 adds four feature areas over Core 5.3: Periodic Advertising with Responses (PAwR), Encrypted Advertising Data, the LE GATT Security Levels Characteristic, and Advertising Coding Selection. Those additions matter most to developers building low-power Bluetooth LE networks; a 5.4 label alone does not mean a phone, headset, or other product supports them.
Bluetooth 5.3 vs. 5.4 at a glance
| Comparison | Bluetooth Core 5.3 | Bluetooth Core 5.4 |
|---|---|---|
| New feature areas | AdvDataInfo in Periodic Advertising; host-to-controller encryption key control enhancements; LE Enhanced Connection Update; and LE Channel Classification, as listed by Bluetooth SIG. | PAwR; Encrypted Advertising Data; LE GATT Security Levels Characteristic; and Advertising Coding Selection, as listed in the Bluetooth SIG Core 5.4 change history. |
| Most relevant to | Bluetooth LE implementations using the listed advertising, connection, encryption-key, or channel-classification capabilities. | Especially low-power networks with many endpoints that need bidirectional communication, as well as implementations using the other new capabilities. |
| Automatic speed, range, or battery gain | Not established as a universal outcome by the cited specification overview. | Not established as a universal outcome by the cited specification overview. |
| Does the version number prove a feature is present? | No. Check the device’s actual supported features and qualifications. | No. Check the device’s actual supported features and qualifications. |
These are Bluetooth Core specification revisions, not performance grades. Bluetooth SIG cautions that promoting a product with a Core version label can create incorrect assumptions about its functionality; consult its guidance on qualification listings and the product’s specific feature support.
What Bluetooth 5.3 added
AdvDataInfo in Periodic Advertising
AdvDataInfo can help a receiver recognize periodic advertising data it has already processed. The controller may then discard repeated data instead of forwarding it to the host. This is a capability, not a guarantee that every 5.3 product uses less power.
Encryption key control enhancements
The 5.3 overview describes an optional host-to-controller command that lets the host specify a minimum acceptable encryption key size when establishing a connection. Whether a device uses this facility depends on its implementation.
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- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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LE Enhanced Connection Update and LE Channel Classification
These are the other two feature areas named in the SIG’s 5.3 overview. The existence of these capabilities does not establish that every 5.3 connection is faster, more reliable, or more secure.
What Bluetooth 5.4 added
Periodic Advertising with Responses (PAwR)
PAwR extends periodic advertising with a way for receivers to respond. Its grouping concept lets devices listen to selected transmissions, making the design relevant to networks with many low-power nodes. Bluetooth SIG describes PAwR as part of an approach enabling secure, bidirectional communication between an access point and many very-low-power end nodes.
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Electronic shelf labels illustrate the kind of application context where many small endpoints may communicate with an access point. That example does not mean a particular label product supports PAwR.
Encrypted Advertising Data
This feature provides a standardized approach to protecting data carried in advertising packets. Bluetooth SIG describes it alongside PAwR for secure, bidirectional communication in large networks of low-power endpoints. Its presence in the specification does not show that a particular product implements it.
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Rank #3
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LE GATT Security Levels Characteristic
This characteristic lets a device indicate security requirements for its GATT functionality. It is a way to communicate requirements, not proof that all services or products using Bluetooth 5.4 have identical security properties.
Advertising Coding Selection
The host can select between supported long-range coding options for extended advertising. This is a selection capability; the specification comparison does not establish a universal range improvement.
Rank #4
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Does Bluetooth 5.4 make a phone or headset a better buy?
Not on the version number alone. The available feature descriptions do not establish a general speed, range, battery-life, or security advantage for all 5.4 phones, headphones, or adapters. For ordinary consumer purchases, compare the specific capabilities you need and confirm that both communicating devices support them. The 5.4 additions are more directly relevant to engineers and product teams developing low-power LE networks, particularly those investigating PAwR and encrypted advertising.
- For headphones or phones: check the supported profiles and features for the intended use rather than paying extra solely for a Core version label.
- For an LE network: verify support for the exact 5.4 capabilities needed, including on both ends of the communication.
- For any device: treat the version as specification context, not a complete feature checklist.
Which specification version should technical teams consult?
Bluetooth SIG says amended Core 5.3 and amended Core 5.4 specifications replaced their original versions. Both amendments took effect on July 1, 2024. For current technical work, use the amended specification and review its mandatory updates: amended Core 5.3 and amended Core 5.4.
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Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
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