[Bluetooth 5.0 Technology] - The Bluetooth receiver uses Bluetooth 5.0 technology, which not only makes the connection faster and more stable but also ensures better sound quality. [Easy to Use] - It has plug-and-play and aux input functions. Connect the Bluetooth receiver to the aux port and simply pair your smartphone or other compatible device to listen to music and hands-free calls with clear sound quality. [Dual Connection] - The Bluetooth receiver can pair two Bluetooth devices simultaneously and automatically reconnects next time. Enjoy your favorite music and never miss any important calls. [Battery Capacity and Bluetooth Range] - Up to 12 hours of playback, only 2 hours of full charging. It can receive signals over long distances and transmit over a distance of approximately 10 meters in an open space. [Broad Compatibility] - Compatible with most smartphones and Bluetooth electronic components, ideal for audio systems in your home or vehicle. It also supports Siri, voice assistant, etc. Built-in Bluetooth audio receiver for home use Bluetooth 5.0 low power consumption Built-in microphone for hands-free calls Easy connection to smartphone Automatic connection after first pairing Support for upper and lower melody and volume control Ultra-light design, net weight only 18.5 g Built-in 200 mA battery for up to 10 hours Includes 100% stereo metal headphone 3.5 mm, which can be directly connected to the built-in audio