In transmitter mode, you can connect to devices like airplanes, TVs, and other non-Bluetooth devices, and then connect Bluetooth headphones to listen to music. In RX mode, you can turn non-Bluetooth devices like car radios or old speakers into Bluetooth-enabled devices and then play music from phones, computers, and more. Enjoy wireless freedom with the Bluetooth Transmitter Receiver, anywhere and anytime. Upgrade to Bluetooth 5.4 for fast transmission with low latency, ensuring seamless audio-video synchronization and clearer sound with more vibrant details, where every note is crystal clear. Free yourself from limitations and enjoy wireless Bluetooth freedom. Connect two AirPods or wireless Bluetooth headsets simultaneously via the Bluetooth receiver. Share musical and visual experiences with your loved ones or friends during a flight. The product's built-in microphone allows you to take calls directly without interrupting music playback when the device is connected to a mobile phone for music playback; it ensures you don't miss important calls while enjoying music. Effortlessly adjust the length to suit your needs, with an automatically retractable design for easy storage and a compact size for ultimate portability. Perfect for connecting devices in the car and at home, keeping your space tidy and ensuring a seamless experience. 1x USB-A Female: Product power interface (DC5±0.25V, ≥200mA); for computers, TVs, and other devices. 1x Bluetooth input: Connection to TVs, smartphones. 1x USB-A socket: Power connection (DC5±0.25V, ≥200mA) for speakers.