[High-Definition Screen]Innovative HD screen displays working status, providing convenient at-a-glance information for easy operation. [Versatile 4-Mode Design]Features four modes to meet various needs: Receive, Transmit, TF Card Transmit, and TF Card Playback, instantly converting wired devices to Bluetooth-compatible. [Wide Compatibility]Compatible with a vast array of audio devices featuring audio input/output ports, including connecting phones to regular speakers or computers to Bluetooth-compatible headphones. [Plug and Play]Equipped with Bluetooth-compatible 5.4 chip, this adapter requires no drivers, offering hassle-free installation and immediate use. [High-Quality Audio]Delivers high-fidelity stereo sound transmission with strong compatibility and rapid connection. [Smart Memory Function]Automatically reconnects to previously paired devices for effortless usage. Specifications: Bluetooth-compatible Version: 5.4 Transmission Distance: 10m Wireless Protocols: AVRCP, A2DP, HFP Output: 3.5mm Audio Charging Port: USB-C Input Voltage/Current: DC 5V TF Card Support: Up to 64GB Supported TF Card Formats: MP3, FLAC, WMA, WAV, APE SNR: >90dB Battery Capacity: 300mAh Charging Time: About 1 Hour Runtime: TX Mode - About 4 Hours, RX Mode - About 7 Hours