1.44" LCD Display: KM18 Bluetooth FM Transmitter has a 1.44" screen for better display of phone calls, FM channels, music, car battery voltage and more. The ideal screen size helps you drive safely without distractions. Flexible Gooseneck&Bluetooth V5.0: The rotatable gooseneck of the wireless RF adapter can provide you with adjustable viewing angle and the best viewing comfort of the LCD screen. With the help of Bluetooth V5.0 technology, the car Bluetooth adapter can provide a more stable and faster connection without intermittent situations. Noise-cancelling and high-fidelity sound: Noise-cancelling technology suppresses road noise for clear, crisp sound for hands-free calls. High-quality music streaming ensures clear sound when listening to music and talking hands-free. Hands-free calling: One-touch for hands-free calling: answer/reject/raise hand/recall lets you switch seamlessly between incoming calls and music. Enjoy full voice control and safer driving with this bluetooth transmitter. Wide Compatibility: Car FM Transmitter Bluetooth is compatible with most devices on the market, such as iPad, iPhone, iPod, HTC, Galaxy, Sony, MP3 players, tablets and Android smartphones. You can play your favorite songs on the car stereo via bluetooth, TF card and auxiliary cable. It is suitable for 12V-24V cars and trucks.