A little smaller than a hockey puck and triangular in shape, a Tunebug turns pretty much any hard surface into a decent speaker for digital music from any device it can connect to via a standard audio jack or, depending on the model, Bluetooth.
While David Pogue at the Times recently took a look at Bluetooth speakers, they were (as I understood it) conventional speakers. Tunebug’s SurfaceSound technology makes the surface part of the speaker.
The company offers a wired version, the $70 Tunebug Vibe, that connects to a digital audio source (e.g. iPod, laptop, MP3 player) with a standard 3.5mm headphone jack. Tunebug says the Vibe’s internal rechargeable battery can power the device for up to 5 hours.