- Wireless audio transmission  - Compatible with virtually any SmartPhone and MP3/ MP4.  - 3.5mm audio plug  - Full frequency range design effectively avoids interruption.  - Provides hands-free conversations through your car speakers.  - 90 degree rotation folding of the audio Plug.  - Built-in lithium battery ( Includes car charger ).<img src="//112.74.112.28/down/products/416696/416696_000.jpg">