LineX LinkPlus PLL Wireless FM Transmitter Audio Adaptor MP3 Wirelessly streams music from your portable MP3 player, CD, MD, PDA or laptop computer through your home or car's FM radio. Low battery indicator / Powered indicator Battery life gives greater than 150 hours Single wire connection Works with any music source that uses an 3.5 mm jack Slim and lightweight design Uses 3 size "AA" batteries (not included) Transmission of audio signals to audio equipment which has FM reception function An ideal device designed for car stereo ?Transmission frequency: 88.0, 88.2, 88.4, 88.8, 89.0, 89.2 MHZ 7 selectable transmission frequencies Signal to noise ratio: 70dB Distortion: 0.5% Extra stable transmission with PLL synthesizer Power on/off switch