Philips BT2500B Portable Bluetooth Speaker $29 Posted @ KG Electronic eBay

Make your move with your music:
Brilliant sound in a slim body that slips in anywhere. Coupled with a stylish design and a aluminium knob for a touch of quality.
Wireless music streaming via Bluetooth:
Wireless music streaming via Bluetooth Bluetooth is a short range wireless communication technology that is both robust and energy-efficient.
The technology allows easy wireless connection to iPod/iPhone/iPad or other Bluetooth devices, such as smartphones, tablets or even laptops. So you can enjoy your favorite music, sound from video or game wireless on this speaker easily.

Anti-clipping function for loud, distortion free music:
Anti-clipping function for loud, distortion free music Anti-Clipping lets you play music louder and keeps it high quality, even when the battery is low.

It accepts the input signals from 300mV to 1000mV and keeps your speakers safe from damage by distortion.

This speaker handles anti-clipping through a dedicated audio limiter IC. This monitors the musical signal as it goes through the amplifier and keeps peaks within the amp's range, preventing the audio distortion caused by clipping without affecting loudness.
A speaker's ability to reproduce musical peaks decreases along with battery power, yet anti-clipping reduces peaks caused by low battery

Built-in microphone for hands-free phone calls:
Built-in microphone for hands-free phone calls With its built-in microphone, this speaker also works as a speaker phone. When a call comes in, the music is put on pause and you can talk via the speaker.

Call for a business meeting. Or, call your friend from a party. Either way, it works great.

Audio-in for easy connection to almost any electronic device

How long does it take to fully charge the device?
4 hours