Features: brand new and high quality Stereo wireless and FM transmission technology, for echo cancellation and noise processing during a call. Support USB/TF card/BT connection; support MP3 format music. Automatic power-off memory function, cigarette lighter power: DC12V-24V voltage power supply. Hands-free Calls: Car Wireless MP3 Player provides a stable connection and echo-cancellation reduces background noise for better hands-free calls. Music playing: Support USB disk/TF card/ MP3/AUX player. With anti-interference performance and CVC technology. Specifications: Material: ABS Color: Black, Gold, Rose Gold, Silver Net Weight: 85g/0.19lbs Package Includes: 1PC Car Wireless MP3 Player FM Transmitter note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.