It allows you to simultaneously pair multiple devices and quickly switch among them with the push of a button.

ENGADGET: Logitech outs Apple-friendly Wireless Solar Keyboard K760, we go hands-on

Each of the two hardware platters has a pair of buttons beneath it letting you switch between decks easily.

ENGADGET: Numark NS7 II Serato DJ controller hands-on (video)

Total Immersion specialises in so-called web mashups, where an online user sees a video reflection of themselves coupled with a 3D object that they can control, such as camera that responds accurately to button presses, or a pair of glasses that lets the user switch the frame or colour scheme.

BBC: Augmented reality goes beyond gimmicks for business

Atheer, another wearable computing startup, debuted its software and prototype hardware, which amounted to a bulky pair of glasses that allowed the user to switch between maps, newspapers and games with gesture controls.

WSJ: For Wearable Computers, Future Looks Blurry

With its easy-switching Bluetooth connection, you can pair your keyboard to as many as three devices and switch among them without having to reconnect.

ENGADGET: Logitech outs Apple-friendly Wireless Solar Keyboard K760, we go hands-on

The bottom board is home to four AA batteries (NiMH), a pair of motors and wheels, a power connector and switch plus some infrared sensors.

ENGADGET

Starting with the keyboard, it's basically the same as the Illuminated Bluetooth K810 keyboard, in that you can pair it with up to three Bluetooth-enabled devices and switch from one to the other by pressing a button.

ENGADGET: Logitech intros two Mac accessories: the Easy-Switch Keyboard and an external trackpad

In fact, when the pair and fellow outfielder Ichiro Suzuki saw reporters studying their positioning today, they conspired to switch things up and play Ichiro in center and Gardner in right, "so you guys would really figure something weird was going on, " Gardner said with a laugh.

WSJ: In the Center of Yankee Change