Safe Drive -- Designed for hands-free calling, so while driving you can pay the attention to the road to keep safe, no need holding phones. the blue ambient ring light on car Bluetooth adapter will light on at blue, making it convenient to use in dark, Easy and comfortable to view volume, car voltage , and FM frequency. | 2 Music Play Modes -- Bluetooth adapter for car can stream crystal clear stereo music freely in 2 ways: 1).Play music from Bluetooth-enabled devices; 2).Transmit music from USB flash drive. | Dual USB Ports Car Charger -- This cigarette lighter Bluetooth car charger Supports charging 2 devices simultaneously with overcharge protection. One USB port can read USB disk, another USB charging port will charge your compatible smart device quickly . Enjoy in-car stereo streaming and charge smartphones at the same time. | Hands-Free Calling -- Built-in microphone with echo cancellation and noise suppression technology, this Bluetooth for cars handsfree provides Answer/Reject/Hand up/Redial calls all in one button; Automatically switch to hands free mode from music Player status when coming calls. | Easy to Use -- Plug this wireless car kit into the cigarette lighter socket, turn your car FM radio to a blank station (88-108.0MHz), and adjust this FM transmitter to the same one; Pair with your phone via Bluetooth 5.0.