Features Built-in Microphone that supports hands-free calling, safe and convenient for driving Noise and wind suppression with CVC technology for full duplex sound quality Memory function: automatically reconnects to previously paired Bluetooth devices when powered on Equipped with 3.5mm audio port for AUX input/output Includes 5V/2.1A USB charging port for fast and efficient charging Easy installation, plug and play design Reliable Bluetooth transmission range Specification This product is a well-designed portable multimedia car FM transmitter that allows you to enjoy music while driving. It delivers high-quality audio performance for computers, digital media players, mobile phones, and other audio devices. Bluetooth Version: V3.0 + EDR Effective Bluetooth Range: 5 meters (actual transmission distance up to 10 meters) FM Frequency Range: 87.5MHz - 108.0MHz Working Voltage: 10V - 24V Audio Input/Output: 3.5mm Audio Interface USB Charging Output: 5V/2.1A Package Weight: approximately 90g Package Included 1 x FM Transmitter 1 x Audio Cable