Combine rearview mirror and Bluetooth technologyFull duplex, DSP technology for noise and echo cancellation. Independent Bluetooth earphone, taken away easilySupport two profiles - Handsfree and HeadsetSuper bright LED caller-ID displayEasy fixing on the original mirror, no installation, no wireUp to 200 hours standby time; Up to 12 hours talking timeSupply optional car or travel charger together with USB cable