iBT24 Bluetooth Rechargeable Stereo Mini Speaker ($80) is iHome's Jambox-sized speaker in its new lineup of rubberized audio devices. It's made to be portable, with a built-in battery and Micro-USB cable for charging. While Bluetooth audio is the key feature, there's also an aux-in port on the back, and an audio cable included. A dedicated port allows you to do wired audio-out to another speaker.
