Additional Details ------------------------------ Product description: Put your lighting scheme outside your box! ANTEC iLuminate LED Light Tubes are designed to add color and excitement to your desktop or room. Powered by a standard USB port in your PC or Mac, the ILM Multicolor External Mini LED Light Tubes unit includes a sound activator so it can pulsate to the beat of your music or games. Cable length - 59 from sound activator to USB connector; 23 from sound activator to the tube