Description 1.The Latest Bluetooth 5.0 technology: Audio receiver plugs into your car audio AUX input and pairs with your favorite Bluetooth enabled device to stream your favorite music. With a built-in microphone, our device also allows you to enjoy crystal clear sound quality on all of your calls. 2.Enjoy Wireless Music: Even your old boom box can be Bluetooth enabled receiver! Simply connect to your wired speakers or boom box with the 3.5mm audio cable, then pair it to your phone or tablet, you will can enjoy wireless music. 3.For More Choice:Car kit aux receiver can connect 2 Bluetooth devices at the same time for enjoying your music and won't miss any calls. freedom to enjoy music, GPS or answer phone calls. 4.Longer Battery Life: Immerse yourself in your music or conversations with up to 8 hours of play time and up to 100 hours of standby! Automatically power off after five minutes without a Bluetooth connection.