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Tiny black USB dongle with a low-profile rectangular body

IHDAPP

IHDAPP BT543 Mini USB Bluetooth 5.4 Adapter

SKU CH-AWRS-YB1P3

Adds Bluetooth 5.4 to Windows PCs, connects up to seven devices within 20m, and plugs in without blocking nearby ports

  • InterfaceUSB
  • Bluetooth StandardsBluetooth 5.4
  • Transfer rateUp to 3.0Mbps
  • ChipsetRealtek
  • Range20m
  • ColorBlack
  • Plug-and-play on Windows 8.1, 10 and 11
  • Driver download enables Windows 7 support
  • Bluetooth 5.4 gives up to 3.0Mbps transfer rate
  • Realtek chipset maintains stable links up to 20m
  • Ultra-compact 0.55" x 0.55" x 0.12" design stays flush with the port

Compact USB Bluetooth 5.4 adapter

The IHDAPP BT543 adds Bluetooth 5.4 to Windows desktops and laptops through a standard USB port. It supports Windows 11, 10 and 8.1 with plug-and-play installation when an internet connection is present, while Windows 7 requires a driver download. The adapter is not compatible with Mac, Linux, TVs, car stereos or Windows 8, XP and Vista.

Low-profile design with minimal power draw

The dongle measures 0.55"L x 0.55"W x 0.12"H and weighs 1 gram, so it stays almost flush with the chassis and adds negligible load to the USB bus. Bluetooth 5.4 delivers a transfer rate up to 3.0Mbps and a 20m range for stable links to headphones, speakers, mice and keyboards. No active cooling is required and the Realtek chipset runs silently.

Replaces missing or outdated built-in Bluetooth

This adapter upgrades systems that lack Bluetooth entirely or rely on an older version that cannot pair newer peripherals. It can maintain up to seven simultaneous connections and two BT543 units can pair directly with each other. The jump is worthwhile when you need Windows 11, 10 or 8.1 support without opening the case or installing an internal card.

Highlights

  • Plug-and-play on Windows 8.1, 10 and 11
  • Driver download enables Windows 7 support
  • Bluetooth 5.4 gives up to 3.0Mbps transfer rate
  • Realtek chipset maintains stable links up to 20m
  • Ultra-compact 0.55" x 0.55" x 0.12" design stays flush with the port

Specifications

ModelBT543
InterfaceUSB
Bluetooth StandardsBluetooth 5.4
Transfer rateUp to 3.0Mbps
ChipsetRealtek
Range20m
ColorBlack
Operating Systems SupportedPlug and play for Windows 8.1, 10, and 11 (make sure your computer is connected to the internet); Supports Win7 (driver required for Win7 and could be downloaded).
FeaturesMini USB Bluetooth 5.4 Adapter
Dimensions0.55"L x 0.55"W x 0.12"H
Weight1 Grams
Package Contents1 x Bluetooth 5.4 Adapter,
1 x User Manual

Questions about this item

How do I install the BT543 on Windows 10 and what step is often missed?

Plug the adapter into a USB port while the PC is online; Windows 10 installs the driver automatically, but you must disable any built-in Bluetooth radio first or the dongle will not take over.

What ongoing maintenance does the BT543 require?

No hardware upkeep is needed; keep Windows Update enabled so the Realtek Bluetooth 5.4 driver stays current and the 3.0 Mbps link remains stable.

What limit appears first during continuous use of the BT543?

The 20 m radio range and 3.0 Mbps throughput ceiling are reached before any thermal or duty-cycle restriction on this 1 g dongle.

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