1. High Precision NeoTitanium Microdrivers delivers superior sound quality2. Audio Control Panel on speaker for power, volume and tone control3. Headphone Jack for private enjoyment of music, movies, or games4. Built in BassXPort Technology enhances low bass frequency5. Subwoofer line-out allows you to upgrade to 2.1 speakers for more bassPerfect speakers for PC/MAC, Notebook, CD/MP3 player, or portable DVD player