AVANTEK BC-Q7 Bluetooth 4.0 Hands-Free Car Kit Wireless Audio Receiver, Music Streaming, 3.5 mm Aux Input Jack, One Button Controller, Built-in Mic, Dual Port USB Car Charger, Siri Support Simple & complete solution for in-vehicle music streaming / hands-free phone calling via Bluetooth connection with your cell phone, tablet or other Bluetooth capable devices. Wirelessly transmit audio through the 3.5mm aux input jack in-car stereo Compactly designed with one-button controller for convenient music streaming or call answering Built-in ground loop isolated IC contributing to extraordinary noise cancelling performance provides supreme audio quality and allows for seamless crystal clear phone calls & music streaming free of ambient noise Automatically powers on and connects to the last paired device when you start your car. Instantly pairs with another device when you slide the side button upward to cut off the connection with last paired device Comes equipped with a high-performance dual port USB car charger dedicated port to power the receiver and a second 2.1A USB port to charge a smartphone or tablet at full speed