Multifunctional Transmitter Receiver Make Home Entertaiment System Wireless - If you wanna transfer home wired device into bluetooth ones, the bluetooth audio adapter can meet your needs. 2-in-1 wireless transmitter receiver is equipped with 3.5mm aux, which Bluetooth-enable of audio devices at home. You can use it to pair phones to play music or movies through home theater, or play music to bluetooth headphones at night but not annoy neighbors.Mini Bluetooth 5.4 Audio Adapter - The Bluetooth 5.4 technology to provide longer transmission distance and stronger connection, audio wont cut in/out easily. Up to 33 feet transmission range meets your daily use needs. You just need to connect it with Non-Bluetooth devices, then they can be upgraded to Bluetooth devices.Safe Hands-free Calling - Built-in mic for answering calls, it equipped with noise cancellation technology, suppress environmental noise, pick up voices more accurately. One button to answer/hang up calls. This aux to bluetooth adapter also supports broadcasting voice notification from navigation. Provides you with the safety and convenience of hands-free calling while driving.New Upgrade TF Card Mode - Insert the TF card directly and connect it to your vehicle, amplifier, wired audio or any aux jack and you'll have a audio experience. If wired headphones are connected, it can be used as an MP3 player to play TF card music directly. Supports multiple formats(MP3/WMA/APE/WAV/FLAC).Plug and Play - Just plug and play, no driver needed, easy to setup. The Bluetooth adapter's built-in battery supports Type-C fast charging. It can be used continuously for about 6 hours after a full charge. Ensures enjoying your favorite wireless content whenever you want. LED display viewing is more convenient, real-time display of power, and the usage status is clear at a glance.