Elevate your audio experience with our Bluetooth Receiver Transmitter 4-in-1 Multifunction device. This versatile gadget is designed to seamlessly integrate with your existing audio equipment, providing high-quality sound and modern connectivity options. Professional Design Our device offers both Bluetooth receive and transmit modes, along with optical coaxial digital to analog conversion. It supports U disk and AUX sound input, featuring a multi-device expansion interface to cater to various audio needs. Plug and Play Easily connect to old speakers or amplifiers via the AUX RCA interface, solving the issue of non-Bluetooth speakers. Enjoy Bluetooth playback and U disk support without the need for drivers—simply plug and play for instant audio enjoyment. HiFi Lossless Sound Experience HiFi shock lossless sound quality with our Bluetooth receiver transmitter. Enjoy clear, noiseless audio that enhances your music experience and mood. It supports multiple formats, including MP3, APE, FLAC, WAV, and WMA. Bluetooth 5.1 Equipped with a Bluetooth 5.1 chip, this adapter ensures stable signal transmission with low latency. It offers high restoration of sound signals in wireless transmission, allowing you to enjoy the sound quality of a wired connection in a wireless setup. Long Range Benefit from a 30-meter unobstructed stable transmission range, ensuring music without delay and a strong signal. This feature allows for seamless room-to-room connectivity without dead ends. Transform your audio setup with our Bluetooth Receiver Transmitter 4-in-1, combining advanced technology with user-friendly features for an unparalleled listening experience.