TP-Link UB4A Bluetooth 4.0 USB Nano Adapter

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Product guide

TP-Link UB4A Bluetooth 4.0 USB Nano Adapter

The TP-Link UB4A is a nano-sized USB Bluetooth adapter intended to add Bluetooth connectivity to a Windows PC or laptop. Its Bluetooth 4.0 and BLE support, backward compatibility claim and small listed dimensions suit buyers who want a compact connection for compatible peripherals, but customer feedback reports mixed connectivity, compatibility and range experiences.

At a glance

Nano-sized USB design for a low-profile connection that can stay plugged into a port.
Bluetooth 4.0 with BLE and claimed support for earlier Bluetooth versions.
Windows support is listed from XP through Windows 10, while driver-free operation is specifically claimed for Windows 8, 8.1 and 10.
The manufacturer claims up to seven connected Bluetooth devices and a transmission distance of up to 20 m in an environment with few shelters.

Price

£3.14Save 15%

Reference price: ~~£3.69~~

Price checked: 13 Nov 2026

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Often bought together

TP-Link UB5A Bluetooth 5.4 USB Adapter for PC, Nano Bluetooth Dongle | Plug & Play, Windows 11/10/8.1/7, Broader Coverage, BLE, Controller, Headset, Mouse, Keyboard

£4.59

Pros and cons

Pros

Compact listed dimensions make the adapter suitable for a port that should remain occupied during travel or everyday use.
Bluetooth 4.0 BLE and backward compatibility are useful when connecting supported newer or older Bluetooth peripherals.
Customer feedback describes plug-and-play use and ease of use positively, although experiences vary.

Technical specifications

17 specifications

Identity and connection
Brand	TP-Link
Model	UB4A
Interface	USB
Data link protocol	Bluetooth, USB
Bluetooth version	Bluetooth 4.0 – applies the latest Bluetooth 4.0 with low energy (BLE) technology
Backward compatibility	full support for Bluetooth V3.0/2.1/2.0/1.1
Data transfer rate	3 Megabits Per Second

Compatibility and software
Compatible device	Desktop
Operating system family	Windows
Minimum required operating system version	Windows XP
Operating systems listed	Windows 10/8.1/8/7/XP
Driver-free claim	Driver free – plug and play for Win 8, Win 8.1, and win 10
Maximum Bluetooth devices	It supports 7 Bluetooth devices at most.

Dimensions and appearance
Dimensions listed	15L x 7W x 19H millimetres
Colour	Black/White

Range claim
Transmission distance	up to 20 m

Warranty
Manufacturer warranty	1 year manufacturer

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: the general device description lists Windows XP through Windows 10, while the driver-free claim covers only Windows 8, 8.1 and 10. The 20 m range is a manufacturer claim for an environment with few shelters, and customer reports about range and connectivity are mixed. The title and feature text mention controllers, headsets, mice and keyboards, but the explicit contents list names only the UB4A, so accessory inclusion is uncertain. Check operating-system and peripheral compatibility for your setup.

What’s in the box

UB4A adapterIncluded
KeyboardCheck selected pack
MouseCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Windows PC or laptop owners seeking a compact USB Bluetooth connection for compatible peripherals.
Buyers who want BLE and stated backward compatibility with older Bluetooth versions.
People who prefer a nano adapter that can remain in a USB port.

Less suited to

Buyers who need a confirmed Windows 11 compatibility claim or assured plug-and-play operation on a particular Windows version.
Setups that depend on a guaranteed range or consistently reliable connection, given the mixed customer feedback.

TP-Link UB4A Bluetooth 4.0 USB Nano Adapter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 102,174 ratings

5 stars69%69%
4 stars16%16%
3 stars8%8%
2 stars2%2%
1 star5%5%

Customer feedback highlights good perceived quality and easy plug-and-play use, while connectivity, Windows 10 compatibility, range and value receive mixed reports. For buyers adding Bluetooth to a Windows computer, positive ease-of-use feedback is encouraging, but it does not guarantee compatibility or range in a particular setup. The listing's Bluetooth 4.0 and Windows claims describe intended support, not proof that every configuration will connect reliably.

Positive themes

Customers describe the adapter's quality positively.
Customers report positive experiences with ease of use and plug-and-play functionality.

Mixed feedback

Customers report both successful connections and connection problems.
Compatibility feedback is mixed, including reports of Windows 10 issues.
Range and value receive mixed feedback.

Frequently asked questions

Which Windows versions are listed for the UB4A?

The listing names Windows 10, 8.1, 8, 7 and XP as supported. Its separate driver-free claim applies to Windows 8, 8.1 and 10, so do not assume the same setup method for every version.

Which Bluetooth versions does it support?

The listing claims Bluetooth 4.0 with BLE and backward compatibility with Bluetooth V3.0/2.1/2.0/1.1.

How many Bluetooth devices can it support?

The manufacturer says it supports up to seven Bluetooth devices. This does not establish that all seven can be used simultaneously.

What is included in the package?

The explicit contents list names the UB4A only. Although feature text mentions peripherals such as a keyboard and mouse, their inclusion is not confirmed, so check the selected listing.