Apple iPod Dock digital player docking station

Summary: When i opened it (1o minuts ago) it came with the three things. i read the manual and found out there are two tops. one for the 40 one for the 20. you snap the piece that fits your ipod on to the the third piece and then it is sealed ( unless you try hard to open it) I plugged it in to the external speakers and it played loud. i keep my speakers on the loudest that way i can control my ipod volume using my air click (remote). so i realized when you attach it to the line out you have to use the speakers volume control.