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Logitech's K810 keyboard pairs with up to three devices, has a button for switching apps in Windows 8 | Engadget
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Amazon.com: NewPower99 Battery Kit for Logitech Bluetooth Illuminated Keyboard K810 with Tools, Video Instructions, Long Life Battery : Electronics
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Amazon.com: NewPower99 Battery Kit for Logitech Bluetooth Illuminated Keyboard K810 with Tools, Video Instructions, Long Life Battery : Electronics
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