This listing is for one new OLDS Wireless FM Audio Transmitter. Operates on 2 AAA batteries and comes with its own 12v charger/power supply. Plugs into your phones 3.5 headphone jack. This Wireless FM Audio Transmitter lets you transmit your favorite mp3's from your phone to your car, truck,boat or home stereo wirelessly. Ex: This means you can control the music in your boat while standing on the beach, while even controling the volume with your phone. Ex: Having a party on your deck, now means you can control your home stereo from outdoors with your phone. Ex: Have a business you would like to advertise? Put your radio frequency on the side of your vehicle so traffic can tune in to your company advertisement. Range is approximately 30'-50' feet or 9-15 meters Operates on FM frequency 106.7 through 107.9 WE SHIP WORLDWIDE!!!