Adapter with built-in digital signal conversion chip for connecting to various interface devices. Supports RAC audio/3.5mm audio output and U disk playback. Driver-free plug-and-play functionality for easy setup. Supports formats like WAV, WMA, APE, FLAC, MP3, etc. for versatile audio playback. Smart Bluetooth-compatible 5.1 technology and multi-protocol transmission, ensuring faster and more stable connections with lossless transmission and live-level sound quality. Item Name: Adapter Material: ABS Frequency Response Range: 10Hz-20kHz Signal-to-noise Ratio: 110dB Distortion Noise: 0.02% Bluetooth-compatible Version: 5.1 Effective Distance: 20 Performance: HiFi Level Support: A 2DP/AVRCP U Disk Supported Formats: WAV.WMA.APE.FLAC.MP3, Etc. Features: Multiple Interfaces, Plug-and-Play, Lossless Transmission Size Details: L: 9cm/3.54", W: 5cm/1.97", H: 2cm/0.79" (Approx.) Notes: 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. Package Includes: 1 x Adapter