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ONE USB RECEIVER FOR BOTH KEYBOARD & MOUSE – Get the wireless range you need as well as great connectivity with this wireless keyboard and mouse. You can use it with Windows, Mac OS, and Chrome OS; simply plug one small, convenient USB receiver into your computer, which automatically connects both the keyboard and mouse, no need for 2 separate receivers! Stable connection and no lag time allow you to use the mouse up to 33 ft.
RECHARGEABLE BATTERY SAVES ENERGY – Forget the annoyance of having to change batteries with this wireless keyboard, which uses a lithium-ion battery to give you up to 90 hours of continuous use on a single charge. When you’re not using them, both the mouse and keyboard will go on standby to save energy. Just click the mouse or hit any key of the wireless keyboard to wake them up (the mouse is powered by 2 AAA batteries, not included).

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Unifying receiver for mouse and keyboard Compatible for any Logitech product that display the Unifying Logo (orange star, connects up to 6 devices)
The unifying receiver working with 6 mice and keyboards in the same time.