SCOSCHE TuneTone Universal FM Stereo Transmitter with Built-In 3.5mm Aux Cable for Cell Phones, MP3 Players, iPods and More Music Devices - Black (FMT5) MULTIPLE CHANNEL OPTIONS - 20 different transmitting frequencies available and updated design ensure a great audio quality LOW PROFILE AUX CABLE - Slim Aux plug fits into any Ipod, phone or music device even with protective cases ON/OFF SWITCH - Included On/Off conserves battery life when not in use, device switches to standby when not in use USE ANY AUX DEVICE - Plays with any device using a standard 3.5mm Aux output including iPods, MP3 Audio devices and most Smart Devices through your car stereo BATTERY POWERED - Transmitter is powered by 2 AAA batteries and has a continuous run time of 15 hours and up to 45 days on standby mode BUY WITH CONFIDENCE: Backed by Scosches Lifetime Tech Support and 3 Year Warranty