Apparently it is portable (runs in batteries) the article at headphonia is very flattering. summarized specs: 3 headphone outputs each one with volume control, 3 6.5 mm and on 3.5 in parallel with the first6.5 mm one. takes 2 AA batteries, or direct AC power. not sure how much weight. read the headphonia article lol i'd gladly give it a try but cant find where to buy.