Sony SRS-NWT10M

The Sony SRS-NWT10M is a highly portable, mono speaker attachment for Sony Walkman MP3 players. It is compatible with almost all models with a WM-Port (NWZ-A820, A810, A720, S710F and S610F series). In its black, pebble-like form, the device weighs less than an ounce, and so is very portable.

Removing the protective cap exposes the device's WM-Port connector, which plugs into a compatible Walkman and allows music to be shared with friends without sharing headphones. The SRS-NWT10M requires no batteries, as it gets its power directly from an attached MP3 player.