This product, the Car Mp3 Player Dual Usb Fast Charger, boasts several key features. First, its dual USB fast charger allows for simultaneous charging of two devices. Additionally, the latest Bluetooth 5.0 technology ensures seamless connection to your device. The FM Transmitter feature also allows for sharing music with others by transmitting FM signals directly from your phone. To easily transfer files between your phone and car, the USB flash drive plug feature comes in handy. With a sleek design measuring 47 x 34 x 79 mm and a weight of 30 grams, this Bluetooth Car Kit is made of durable ABS material. The 3.1A input current provides intelligent charging for your devices, and the blue digital display makes for easy use. With an emission efficiency of 87.5-108MHZ and an effective distance of about 10.5 meters, this Bluetooth Car Kit is also equipped with the latest Bluetooth 5.0 version and supports expansion up to U disk <