【Please Check Your Windows OS before Ordering】Win8.1/10/11 Driver-Free, Plug & Play. Win7 Driver-Needed(Go to the official llano website or contact customer service to get the driver and View the user manual) | 【2023 Upgraded Intelligence 5.1 Chip】llano newest Bluetooth adapter uses the 5.1 chip with higher sensitivity, faster transmission, and more stable signal, which is easily backward compatible with 5.0/4.1/4.0 and never loses connection! | 【Compatible with 99% of Devices】llano Bluetooth adapter can connect 7 devices at the same time, such as Bluetooth headset, speaker, keyboard, mouse, mobile phone, game controller, tablet, printer, etc, easy to connect, is ideal for leisure and entertainment/work. | 【Mini Size】This compact Bluetooth 5.1 USB adapter allows you to leave it on your laptop or PC, no need to remove, won't block surrounding USB ports, easy to carry and space-saving. What’s more, comes with a lanyard, can effectively prevent the Bluetooth adapter from being lost, and it is also convenient to carry it with you. | 【Wonderful Design & Function】Blue indicator light design, let you know the working status clearly. In addition, it has a memory function, after the first pairing, it will automatically connect when the device is turned on again. Excellent design and function, more convenient and practical, let you have a great use experience. | 【LIFETIME WARRANTY SUPPORT】 The fees you pay not only include a high-quality Bluetooth 5.1 Adapter, but also the most professional After-Sales service of llano on the market. Go to the llano product page and click the seller's name. To click [Ask a question]. Whatever issues, please contact us in time to activate your lifetime warranty. Don't waste any of your money.