This is bascially a set of stylized dust caps for the ports on your 6th-Gen iPod Nano. Very handy if you wear it as a watch with a Lunatik band (as I do on occasion) and wash your hands extremely carfeully to avoid getting the watch wet. Also, these 'iPlugs' are styled so that it give the nano a more watch-like appearance. The 30-pin dustcap is made to resemble a traditional crown on a watch (check out Apple's new watch, they incorporated a crown!) and the earphone port cap also resembles another crown or pusher (which would normally control a chronograph or secondary function on a traditional timepiece). Neither piece functions other than to keep dust, dirt, debris, and water out of your ports. That being said, the parts are not water tight, so please don't submerge your device thinking they will protect it. They won't. But they'll likely stop some splashing during regular handwashing or when you're caught in a downpour.