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 won’t 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 2 Modes - In TX mode, the Bluetooth transmitter is plugged into non-Bluetooth devices such as TV/PC via AUX jack and transmits audio to Bluetooth headphones/speaker. In RX mode, connect the device to a wired speaker/car stereo, you can receive the audio form phone via Bluetooth. Bring new life for you old home system. Insert a TF card and connect it to vehicle or any audio device with aux jack and you'll have a music experience.Plug and Play & Easy to Use - Just plug and play, no driver needed, easy to setup. The Bluetooth aux adapter supports Type-C fast charging and can be used continuously for about 9.5 hours after a full charge. Ensures enjoying your favorite wireless content whenever you want. One-click sliding design to switch TX/RX mode, answer/end a call/play/pause with a single button, making it convenient to use.