Logitech S135i 30-Pin iPod Speaker Dock Made for iPod so you can dock, play, and charge your iPod. Bass Boost for deep bass sound in a small portable speaker. Great sound and can run on batteries when you want to take your music with you. Easy to use: Simply dock your iPod or plug in your mp3 player and hit power to listen. Includes easy access buttons to adjust volume and select bass boost.