Bluetooth 5.4 and Lower Latency: This Bluetooth transmitter or receiver utilizes the latest Bluetooth 5.4 chip, offering superior audio decoding for up to 99 percent low latency. It delivers high-fidelity stereo sound, closely matching CD-quality standards and preserving the original audio. Multifunction Transmitter or Receiver: In TX mode, connect non-Bluetooth audio sources like airplanes, TVs, or MP3 players to Bluetooth-enabled speakers or headphones using a 3.5 mm (AUX or RCA) cable. In RX mode, receive audio from a smartphone or other Bluetooth device and transmit it to non-Bluetooth wired speakers or car or home stereos. TF Card Mode: When a TF card is inserted, the Bluetooth adapter can either transmit audio to wireless headphones or a stereo system, or it can connect to devices without Bluetooth, such as stereos, cars, or wired headsets, via a 3.5mm interface to play audio directly from the card. (Note: The TF card is not included and must be purchased separately). HD Screen: The Bluetooth adapter features an LED screen that displays real-time battery capacity and volume information, eliminating the need for guesswork. It also shows the model name of paired devices (e.g., headphones or AirPods), the selected mode (TX or RX or TF Card), and audio format (SBC or AAC or aptX-HD or LL or AD). This user-friendly design enhances your audio streaming experience. Safety and Wide Compatibility: The Bluetooth audio transmitter complies with global quality standards and is certified by FCC, CE, RoHS, BQB, and other relevant organizations. It incorporates safety features such as voltage endurance, overcurrent, short circuit, and NTC overheat protection. The compact design, 4-in-1 functionality, and advanced Bluetooth 5.4 technology offer a premium audio experience. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.