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Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
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Logitech MK540 Advanced Keyboard and Mouse Combo - Wireless, 2.4 GHz, Integrated Palm Rest, Adjustable Feet, Optical Sensor, Ambidextrous Design, Windows & Chrome OS Compatible - 920-008671 at TigerDirect.com
