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Small USB Bluetooth 5.4 dongle with frosted ABS shell and blue indicator light

SMA

SMA BT542Adapter Bluetooth 5.4 USB Adapter

SKU CH-NS1Y-FH61F

Adds Bluetooth 5.4 to Windows PCs with dual-mode support, 20 m range and simultaneous connection for up to 7 devices

  • TypeBluetooth Adapter
  • Bluetooth 5.4 dual-mode for stable, low-latency links
  • 3 Mbps throughput and 20 m open-range coverage
  • Driver-free on Windows 8.1, 10 and 11
  • Auto-reconnect memory pairing after first setup
  • Connects up to 7 devices simultaneously

Bluetooth 5.4 USB Adapter

The SMA BT542Adapter adds Bluetooth 5.4 to Windows PCs through a USB 2.0 or 3.0 port. It supports dual-mode BR and BLE operation plus EDR for headsets, speakers, keyboards, mice and printers. Driver-free on Windows 8.1, 10 and 11; Windows 7 requires a driver. Mac OS and iOS are not supported.

Sustained Connection Stability

Bluetooth 5.4 dual-mode and dual-channel transmission keeps latency low and throughput steady at up to 3 Mbps. The adapter maintains reliable links for up to seven simultaneous devices without mutual interference. Memory pairing restores connections automatically after the initial setup.

Thermals Noise Power

The intelligent low-power chip operates from minus 20 to 70 degrees Celsius without active cooling. A gold-plated USB connector resists oxidation for consistent conductivity. The frosted ABS shell stays silent and draws minimal current from the host port.

Highlights

  • Bluetooth 5.4 dual-mode for stable, low-latency links
  • 3 Mbps throughput and 20 m open-range coverage
  • Driver-free on Windows 8.1, 10 and 11
  • Auto-reconnect memory pairing after first setup
  • Connects up to 7 devices simultaneously

Specifications

BrandSMA
ModelBT542Adapter
TypeBluetooth Adapter

Questions about this item

Does the Bluetooth 5.4 adapter run warm or draw much power during all-day use?

The adapter uses an intelligent low-power chip and supports Cass2 Power level for 20 metre range, so heat and power draw stay minimal during continuous operation.

What operating system must my PC already run for driver-free use?

Windows 8.1, 10 or 11 provide plug-and-play support; Windows 7 requires a separate driver installation.

Will my Bluetooth 2.1 headset pair reliably with this Bluetooth 5.4 dongle?

Yes, the adapter is backward compatible with Bluetooth 2.1, 2.0, 3.0, 4.0, 5.0, 5.1 and 5.3 specifications.

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