i Trip is not just for iPod anymore. i Trip is a large family of products with a distinguished heritage. All i Trips send your music wirelessly to your FM radio so you can listen through your own speakers. We call this particular one Auto because it gets its power from your vehicles 12 volt accessory outlet or cigarette lighter. & we call it. Universal because it works with almost any portable audio device that has a standard 1/8 headphone jack (whether CD, MP3, cassette, or, yes, iPod) & the Plus in the name of this i Trip model refers to its ability to charge a portable player by means of a built-in USB (Universal Serial Bus) port. (Check your players documentation for charging capability) Plug in your players USB (Universal Serial Bus) charging cable. Not only do you get to listen to your tunes while youre traveling, you arrive with a fully-charged player. Technical Specifications. Dimensions: 12.5 mm. x 26 mm. x 72 mm. Total length including cable: 85 cm. Weight: 0.6 oz. Antenna: Built-in Power: Provided by cigarette lighter or 12 volt power outlet (no batteries required) Modulation: FM stereo. Frequencies: 88.1. 107.9 MHz. Oscillator: High stability crystal, phase-lock loop control. Frequency Response: 50 Hz. to 15 k Hz. FCC Compliance: PAV9501.