The ASUS USB-BT540 (part number 90IG09N0-MO0B10) is a Bluetooth 5.4 USB adapter with Bluetooth Low Energy (BLE), up to 3 Mbps data rate, up to 40 m BLE range in open space and support for up to 7 connected devices, in a tiny 14.9 x 17.4 x 7.1 mm, 1.9 g body.
It adds modern Bluetooth to any desktop PC or laptop with a USB Type-A port, so you can pair wireless headsets, controllers, keyboards, mice and speakers. Ideal for PCs without built-in Bluetooth or with an older Bluetooth 4.x chip.
Key Features
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Bluetooth 5.4 – latest Bluetooth version with Classic (BR/EDR) and Low Energy (BLE) support
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Up to 7 devices at once – connect headset, mouse, keyboard, controller and more simultaneously
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Auracast audio sharing – broadcast audio to multiple Auracast-capable devices (all devices must support Auracast)
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LC3 codec – higher-quality audio with about 50% lower device power consumption, per ASUS (LE Audio requires OS support)
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Faster and farther – about 2x data speed and 4x range versus Bluetooth 4.x adapters, per ASUS
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Long BLE range – up to 40 m in open space (BLE), up to 10 m Classic
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Nano form factor – 1.9 g and only 7.1 mm thick, stays plugged in on a laptop
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Windows and Linux – supports Windows 10/11 and Linux
Full Specifications
| General |
| Brand |
ASUS |
| Model |
USB-BT540 |
| Part Number |
90IG09N0-MO0B10 |
| Type |
Bluetooth 5.4 USB adapter |
| Bluetooth |
| Standard |
Bluetooth 5.4, Bluetooth Classic (BR/EDR), Bluetooth Low Energy (BLE) |
| Data Rate |
Up to 3 Mbps (Classic BR/EDR); 2 Mbps (BLE) |
| Range |
Up to 10 m (Classic BR/EDR); up to 40 m (BLE) in open space |
| Frequency Band |
2402 – 2480 MHz |
| Spectrum |
FHSS (Frequency Hopping Spread Spectrum) |
| Modulation |
GFSK (1M/2Mbps), π/4-DQPSK (2Mbps), 8-DPSK (3Mbps) |
| Simultaneous Devices |
Up to 7 Bluetooth devices |
| Connectivity |
| Interface |
USB 2.0 Type-A |
| Compatibility |
| OS Support |
Windows 10 / 11, Linux |
| Physical |
| Dimensions |
14.9 x 17.4 x 7.1 mm |
| Weight |
1.9 g |
| Warranty |
| Warranty |
Official ASUS warranty |
Who Is This For?
- Desktop PCs without built-in Bluetooth
- Laptops with an old or faulty Bluetooth module
- Gamers connecting wireless controllers and headsets
- Office users with Bluetooth keyboards, mice and earbuds
How It Compares
Compared with Bluetooth 4.x USB adapters, ASUS rates the USB-BT540 at about 2x the data speed and 4x the range. If you also need Wi-Fi, the ASUS PCE-AXE59BT PCIe card combines Wi-Fi 6E with Bluetooth 5.2.
In the Box
- 1 x Bluetooth 5.4 USB adapter
- 1 x Quick start guide
- 1 x Warranty card
Why Buy from PC PARK?
- 100% original product with official ASUS warranty
- Delivery to all regions of Saudi Arabia (Riyadh, Jeddah, Dammam and more)
- Secure online checkout
- Pre- and after-sales support from the PC PARK team
Frequently Asked Questions
What Bluetooth version is the ASUS USB-BT540?
It is a Bluetooth 5.4 adapter supporting both Bluetooth Classic (BR/EDR) and Bluetooth Low Energy (BLE).
How many devices can I connect to the USB-BT540?
Up to 7 Bluetooth devices can be connected at the same time.
Which operating systems does it support?
ASUS lists support for Windows 10, Windows 11 and Linux.
What is the range of the ASUS USB-BT540?
Up to 10 m for Classic Bluetooth and up to 40 m for BLE in open space.
Does it support Auracast and LE Audio?
Yes, it supports Auracast and the LC3 codec; LE Audio needs OS support and Auracast needs compatible devices.
Is the ASUS USB-BT540 original with warranty?
Yes. PC PARK sells 100% original ASUS products with the official ASUS warranty.
Do you deliver the USB-BT540 in Saudi Arabia?
PC PARK delivers to all regions of Saudi Arabia, with delivery time shown at checkout.
Order the ASUS USB-BT540 Bluetooth 5.4 USB adapter from PC PARK with official warranty and fast delivery across Saudi Arabia.
