The Nulaxy KM18 Wireless In-Car Bluetooth FM Transmitter Radio Adapter Kit is a versatile and compact device designed to provide high-quality audio in your car. With its universal compatibility and FM band output, it easily connects to your car radio for a seamless listening experience. The unit features a USB-C input connection, wired and Bluetooth wireless output connections, and a variety of audio inputs including digital audio and optical TOSLINK. Its sleek black design and LCD screen make it a stylish and functional addition to your car, with features such as station presets, charging capability, and memory card slot enhancing its convenience and versatility. Opened package but my daughter never used. For older cars that do not come with Bluetooth button. Nonsmoking home.