IPod

An iPod was a music storage and listening device from 21st century Earth.

Incidents of use
Owen Harper listened to "Atlas" by Battles on his iPod while cleaning his flat. (TV: A Day in the Death)

In 5,000,000,000, Cassandra mistakenly called a jukebox she owned an "iPod". She called Soft Cell's "Tainted Love" a traditional song, and Britney Spears' "Toxic" a ballad from Earth's classical era. (TV: The End of the World)

Other similarly named devices from that era included the iPad and the iPhone. (TV: Dark Water, Kill the Moon)