TeckNet in Car Audio Connect AUX-Bluetooth Hands-Free Car Kit Wireless Music Receiver Audio Adapter with 2-Port USB Car Charger, Built-in Mic, Magnetic Base for Car Audio Streaming Sound System Connects with your smartphone or MP3 player via Bluetooth, Routes calls and music from a smartphone through car speakers Embedded microphone mounts anywhere on the dashboard for better voice pick up Bluetooth connects to smartphone; Aux-in connects to car stereo and power adapter with USB port for charging Seamlessly switches between calls and music along with One-Touch button for easy operation Built-in echo cancellation technology ensures optimal sound during calls