Nulaxy KM18 is the best selling FM Transmitter on the market, has been consolidated by uniting quality and high technology. The functions that our KM18 adds to your car without any type of installation and wires is incredible. With our device you bring your classic car to a new generation without change its style or damage the originality of your car. Add in Your Car: 1) Answer calls phones safely and with one click; 2) Listen to music from your phone, MP3 player, tablet , laptop, tf card and connected devices via aux cable in the sound of your car; 3) Control the quality of your car battery with our voltmeter function; 4) Charge your devices through the secure USB port; 5) LCD screen with ideal size to view your telephone calls, music, car battery voltage and other information with more comfort and quality. Add all these functions with just one device is not amazing? Bring your car to new generation in a simple and safe way! Nulaxy, driving you safer and better. Kindly Reminder: Recently lots of customers are complaining that they purchased cheap knockoffs and could not register warranty with Nulaxy. Please be noted Nulaxy Direct is the only official and authorized store for Nulaxy KM18. If you purchased from other store, you can report to Nulaxy and Amazon for being counterfeited.