Worry-Free After-Sales: lifetime technical support, never worry about any problems. We are confident in the quality of the Bluetooth receiver transmitter and are willing to provide a 12-month replacement warranty and a 30-day unconditional refund. If you have any questions, please contact our customer support, we will provide you with a fast and enthusiastic solution at the first time. Reliable Quality: With the latest version of V5.0EDR and high-definition audio technology, our Bluetooth receiver transmitter can be connected to the device more stably, and can transmit quickly and reduce noise as well as low latency to ensure excellent stereo effects. Built-in high-definition microphone so you can talk hands-free. CVC noise reduction technology makes your call more clear. Automatic pairing connection function and dual connection, making your music sharing easier. Excellent performance design: 2-in-1 design is not only a Bluetooth receiver or a Bluetooth transmitter, Our device has two uses, making your life more intelligent. The button design allows you to use it conveniently and quickly, and you can easily switch in the transmitter/receive mode to solve your various usage needs. At the same time, just click a button to answer/cancel/end the call so you can drive safely. In addition, it also supports voice navigation of mobile phones. Easy to Use & Widely Compatible: Just plug the 3.5mm AUX cable into the adapter and plug it into the aux jack of your device, switch to the mode you need (RX/TX) and you can use it easily. Widely support all Bluetooth devices (for example: iPhone, iPad, iPod, tablet, Samsung and other Andriod smartphones) to pair as a hands-free kit. Very suitable for your old home/car audio system and wired headset/TV/PC etc. Can provide you with high-definition wireless stereo music/hands-free calling. Upgraded Version: Our Bluetooth AUX adapter receiver. Designed for non-Bluetooth audio systems. It is the perfect solution for your various non-Bluetooth home audio systems or car speakers to achieve the ideal wireless audio. No battery, easy to use, convenient and compact design makes your audio system look smooth and beautiful. A connection range of up to 33 feet allows you to get rid of messy cables and experience wireless music.