Usage Tips:Multifunctional mitter Receiver Make Home Entertaiment System Wireless - If you wanna fer home wired device into bluetooth , the bluetooth audio adapter can meet your needs. 2-in-1 wireless mitter receiver is equipped with 3.5mm aux, which Bluetooth-enable of audio devices . You can use it to pair phones to or through home theater, or to bluetooth headphones at night but not annoy neighbors. Mini Bluetooth 5.4 Audio Adapter - The Bluetooth 5.4 technology to provide longer mission distance and stronger connection, audio 't cut in/out easily. Up to 33 feet mission 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. 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 Tpye-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. Colour:Gray-black Material:plastic Package Contents: 1 x Bluetooth mitter Receiver Only the above