personal stereo 
noun
A small portable audio player, used with lightweight headphones.A personal stereo with decent headphones can transform a walk or sunbathing session into a private, memorable musical experience....
- Perhaps it's a device that can tune into other people's personal stereos, so she can listen in to their music.
- There are people reading books and pretending to listen to personal stereos underneath placards at every corner now.
- unpromisingly
- unpromisingness
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- unpronounce
- unpronounceable
- unpronounceably
- unpronounced
- unprop
- unproper
- unproperly
- unproperness
- unpropertied
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- unpropitiousness
- unproportion