The fingertip-sized UbiChip that forms the guts of the device can be put into pretty much anything provided it's in contact with your skin and it can detect the shock so you could turn on a Bluetooth headset by tapping your earlobe rather than fumbling for a button, or tweak the volume of your cellphone by tapping your face.

ENGADGET: A fingertap away

On the right edge, you'll notice a volume jog dial for incoming chat audio and a backlit button for switching between speaker and headset mode.

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