DOCK FOR MP3, works on ipod, and computer, laptop or desktop. I got it for the MP3 player. GPX, model: HM109B; frequency range AM 530; uses 2 AA batteries for back up for clock. Digital clock display in front and volume knob and tuning knob; top is power on/off button, ipod/buzz and fm radio, aux buzz and am radio; Top also has indentation for the ipod, I used an MP3 player, works on both. Also has the clock set, hour, min; 5 plug-in places in back, headset or phones, auz in, dc 9v/in and 2 speaker out. Also an FM antenna attached. This is a 3 pc. set with long cords on the speakers and includes a cord to plug in for electric. USPS.