USB Bluetooth 5.4 Adapter – The magical BT540 wireless Bluetooth dongle can allow your Non-Bluetooth PC Laptop Desktop Computer to feature latest Bluetooth 5.4 function at once. Then you can enable your PC to pair & connect with Bluetooth headphones/headset/mouse/keyboard/printer/tablet to enjoy stereo, clear calling, wireless operation or files transfer freely. Plug and Play for Windows OS – Plug 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). Notes: 1. The BT540 PC adapter is not compatible with Mac, Linux, TV, Car-stereo or Windows 8 XP vista. 2. BT540 is not to be used directly on any Game console, only for game controllers used on PC. 3. Two BT540 dongle can be paired with each other. The Most Advanced Bluetooth 5.4 Technology - Engineered with the latest Realtek Bluetooth 5.4 chipset supports dual mode (BR/EDR + BLE). Greatly improves the stability of the connection data transfer speed, reduces the possibility of 2.4GHz signal interruption and gets low power consumption. Can link BR/EDR and BLE at the same time, No delay, No loss and it is backward wide compatible with old Bluetooth 5.3/5.1/5.04.2/4.0/3.0/2.1/2.0/1.1. Get Clear Calls, Enjoy Stereo Music – BT540 Bluetooth USB for PC/Laptop to pair with Bluetooth headphones or speakers for superior stereo music wireless streaming. Also, you have the ability to take Skype online calls using your headset mic and use the USB adapter to transfer data files to / from mobile phones / tablets. Faster Speed, Farther Coverage – With the upgraded Bluetooth 5.4 technology and the unique built-in smart antenna, this USB Bluetooth PC adapter will get faster data transfer speeds of up to full 3 Mbps, which is double what old Bluetooth supports and extend range of transmission distance up to 66ft/20M that is four times compared to old Bluetooth in open space. Note: The operational range can be affected by walls, physical obstructions and wireless interference. Up to 7 Devices Sync Connected - BT540 Bluetooth 5.4 dongle for PC Laptop supports up to 7 different types of devices to be connected and can work together at the same time without interfering with each other, Which means that you can listen to high-quality music while using the keyboard mouse or other devices. But If Bluetooth audio devices of the same type (such as speakers/headphones) are connected, only one of them can play music. Warm Tips – 1. Ensure there is no Bluetooth built-in the computer. If there is, please be sure to disable all existing Bluetooth devices in "Device Manager" at first, then insert the adapter and try again. 2. If you have any question about the driver installation or product usage, you can contact our reliable customer service via Amazon Message, and we will reply to you quickly within 24 hours. Hakimonoe Latest Bluetooth 5.4 USB adapter, compatible with old Bluetooth 5.3/5.1/5.0/4.24.0/3.0/2.1/2.0/1.1, turns Non-Bluetooth PC Laptop or Desktop into Bluetooth capable. BT540 mini USB dongle, Low profile compact design allows you to leave plugged in your laptop or PC without blocking or interfering surrounding USB ports. Save space with this mini wireless USB dongle for Bluetooth printers, speakers, headphones, headsets, keyboards, mice and more. Easy to Setup System Required: Windows 11/10/8.1/7, Not for Windows 8/XP/Vista Plug and play for Windows 8.1, 10, and 11 Driver Required for Win7 Recommended Uses: Bluetooth Headset, Headphones and Speakers Bluetooth Keyboard and Mouse Bluetooth Smartwatch, Printer, Mobile Phone/ Tablet. Warm Tips: Please note that existing internal Bluetooth function needs to be disabled to utilize BT540 dongle. Special Notes: 1.Not work with Mac OS, Linux, car systems, TVs and Game consoles. 2.Not Recommend for Work PC if you cannot install any drivers. 3.Game controllers may require specific drivers for different games / platform to configure button settings. Specifications: Bluetooth Version: 5.4 with BR/EDR+BLE - Data Transfer Rate Up to 3Mbps Operation Range: Class II, Up to 20 Meters Audio Codec Support - SBC Bluetooth Profiles - A2DP/AVRCP/HFP/HSP/SPP/HID/GAVDP etc Product Size – 1.4 cm X 3.0 cm X 0.7 cm