A gentle reminder: Should your computer lack a CD-ROM drive for driver installation, rest assured that you can download the Bluetooth driver via GAROGYI's web URL. The driver content is identical to that found on the CD. Web URL: dropbox.com/s/3ktdqbq7egr50ee/Rtl5.3%20Driver.zip?dl=0. Ensuring backward compatibility is another strength—this adapter effortlessly supports Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 5.0, and Bluetooth 5.1, alongside other specifications.The USB 2.0 interface ensures compatibility, while maintaining the ability to function seamlessly with USB 3.0. Enjoy lightning-fast connections thanks to ultra-low latency, coupled with intelligent sleep and wake functions that prioritize energy efficiency. Further fortifications include a 24-bit CRC (Cyclic Redundancy Check) to combat interference and adaptive frequency hopping, which minimizes disruptions. The original manufacturer driver management software, provided by REALTEK, delivers a user-friendly interface with an array of features. It additionally supports various application program extensions, enhancing its versatility. Experience a heightened level of transmission stability with a brisk 3Mbps transmission rate, enabling rapid file and audio data transfers. The range of transmission is notably extended: Thanks to the Class 1 protocol, unobstructed transmission can span up to an impressive 150 meters with a strong, unwavering signal. At its core, this adapter employs the Taiwan Realtek 5.3 chip, fully aligned with Bluetooth 5.3's rigorous technical specifications, supporting dual-mode low-power transmission. For Windows 11, 10, and 8.1, it's plug-and-play; no drivers needed. Windows 7 might need manual installation. Usually, plug-and-play works, but manual install can help if needed. Note: Without a CD-ROM, get the driver from GAROGYI's URL: dropbox.com/s/3ktdqbq7egr50ee/Rtl5.3%20Driver.zip?dl=0. Facilitating wireless connections between your computer and an array of Bluetooth devices—ranging from headphones, speakers, mice, keyboards, game controllers, smartphones to printers—this adapter excels in transmitting audio, data, and images effortlessly. The GAROGYI 5.3 Bluetooth adapter stands out as a cutting-edge product, boasting advanced features that ensure rapid connectivity. Its reputation is built on robust compatibility, unwavering high-speed performance, and an extended reach for signals. This adapter harmonizes seamlessly with widely used operating systems such as Windows 7, Windows 8.1, Windows 10, and the most recent addition, Windows 11.