Product Features: Bluetooth 5.3 chip design for enhanced compatibility and stable connectivity. Combines Bluetooth Receiving (RX), Bluetooth Transmitting (TX), and FM Transmitting in a 3-in-1 design. Features a high-definition LED digital display to clearly show working status and Bluetooth mode. Built-in 300mAh rechargeable lithium battery for long-lasting performance. Supports FM transmission with adjustable frequency from 87.5 to 107.9MHz. Enables quick connection to car audio systems via FM frequency modulation for convenient and efficient use. Equipped with a built-in high-definition microphone for wireless music streaming, hands-free calling, and navigation support. (Note: Microphone is not supported in TX Transmitter Mode.) Delivers high-resolution, lossless audio quality for a CD-like listening experience. Receiver Mode compatible with car kits, wired speakers, home speakers, speaker amplifiers, and headphones. Transmitter Mode compatible with TV, PC, projector, amplifier, TV box, Bluetooth headphones, earphones, and Bluetooth speakers. FM Transmitter Mode designed for car kits, with built-in microphone for HD hands-free calling. Mode 1: TX Transmitter Mode Adds Bluetooth functionality to non-Bluetooth devices such as TVs and computers, allowing wireless connection to Bluetooth speakers or headphones. Utilizes advanced Bluetooth technology for automatic pairing when devices are within proximity. Mode 2: RX Receiver Mode Enables wired speakers or headphones to receive Bluetooth audio signals, allowing wireless connection from Bluetooth-enabled devices like smartphones. Mode 3: FM Transmitter Mode (87.5107.9MHz) Quickly connects to car stereos via FM frequency modulation for seamless audio playback. (Note: This function is for audio transmission only and does not support FM radio reception.) Product Specifications: Model: 3-in-1 Wireless Audio Adapter Bluetooth Version: 5.3+ Battery Capacity: 300mAh Operating Range: Up to 10 meters (in open space) Material: Plastic Color: White Package Contents: 1 x 3-in-1 Bluetooth 5.3 Wireless Audio Adapter 1 x 3.5mm AUX Audio Cable 1 x Type-C Charging Cable Note: The package includes only the items listed above. Actual product color may vary slightly due to lighting and display differences. Size measurements may vary by 13 cm.