The Wireless Keyboard K340 from Logitech is a compact wireless keyboard for use with Windows-based computers. It uses the included Logitech Unifying receiver, which plugs into an available USB port, to communicate with your computer sans wires. This receiver can also be used with other compatible Logitech wireless input devices, eliminating the need to use a separate receiver or keyboard and mouse.
The keyboard uses high-frequency 2.4GHz technology, which eliminates dropouts, delays, and interference. Even though the keyboard features a dedicated numeric keypad, its footprint is much smaller than that of full-size keyboards. Low-profile keys allow you to position your hands more comfortably when typing, and programmable F-keys let you better control your computer. The keyboard can operate for up to 3 years between battery changes.