Pyle iPod/iPhone Headphone Amplifier - PHE1AB
This iPod/iPhone headphone amplifier plugs into your iDevice's 30-pin dock connector and amplifies the line-level output for a higher-quality signal. The Texas Instruments amplifier creates a high-power output to drive high impedance or low sensitivity headphones or earphones. Plus it has a volume control remote, so you can control your iPhone or iPod from the headphones with your player in your pocket. Clip it onto anything using the built-in clip. It's powered by your iPhone or iPod, so no battery is required.