1. Double Connection: The portable Bluetooth receiver can connect to two devices simultaneously. Bluetooth 5.0 significantly enhances audio data transmission speed, ensuring smooth music playback with lower latency and sound quality. Additionally, it extends the effective transmission range up to 10 meters, meeting everyday needs. 2. CVC Noise Cancellation: Our Bluetooth audio receiver features CVC noise cancellation technology and a DSP chip, delivering clear audio and authentic voice transmission. It eliminates echoes and blocks annoying background noise (such as wind, traffic, or crowds), providing you with a CDlike music experience. 3. Builtin Microphone for Hands Calling Navigation: This Bluetooth car adapter comes with a builtin microphone and a multifunction button for answering/hanging up/rejecting or redialing calls. Simply connect the 3.5mm AUX converter of the Bluetooth port to your car's AUX interface and pair it with your phone to enable hands calls, dynamic music playback, and streaming voice notifications from navigation apps. 4. Plug Play: No installation required—just connect the receiver to your device, and you're ready to go. Under normal usage, this Bluetooth receiver operates for up to 15 hours. With the included USB fastcharging cable, it can be fully charged in just 2.5 hours.