- Multifunction Bluetooth 5.2 receiver adapter with USB storage support, hands-free calling, and NFC pairing. It can play music from a USB removable storage device without an internet connection. - Automatic power on and stable signal: NFC pairing receiver powers on automatically when powered, making it ideal for cars or other vehicles. Provides up to 10 meters (32.8 feet) of wireless range with a built-in antenna to reduce signal interference. - Dual-device connection: Can pair with two devices at the same time and switch between them as needed. This enables convenient playback from two phones and supports listening to audio from either device. - Multi-port wireless playback: Supports simultaneous connection to a 3.5 mm audio port and two RCA sound ports. Connect ordinary speakers that lack Bluetooth to the 3.5 mm port and play audio wirelessly. - Practical use scenarios: - In-car entertainment: automatically powers on when the car is powered, pairs via NFC or Bluetooth, streams music from a phone or USB storage, and supports hands-free calling. - Home stereo setup: connects to non-Bluetooth speakers via 3.5 mm or RCA outputs, enabling wireless playback from a smartphone or USB storage without network access. - On-the-go dual-source use: pair two devices, switch between phones for music or video playback as needed while maintaining stable wireless performance.