The DEXP AT-BT501 Bluetooth Adapter is a compact nano USB dongle that seamlessly adds Bluetooth functionality to non-Bluetooth audio devices. With its user-friendly design, this adapter allows users to wirelessly stream audio from smartphones, tablets, or other Bluetooth-enabled devices to non-Bluetooth speakers, headphones, or car stereos. Equipped with Bluetooth 5.0 technology, it ensures a stable and high-quality audio transmission. The AT-BT501 also features a built-in microphone, enabling hands-free calling when connected to a car stereo or speaker system. Its plug-and-play setup and long battery life make it a convenient and efficient solution for modernizing audio systems.