•Open Box, NEVER BEEN REMOVED FROM BOX OR USED ONCE. • Works with your Mac computer right out of the box - no installation software required. Robust Wireless Connection • Logitech Advanced 2.4 GHz wireless virtually eliminates delays, dropouts, and interference. • Long-range connection lets you work or play in more places, like your comfy couch. • 128-bit AES encryption What's In The Box? • Keyboard • Logitech Unifying receiver • Wireless Extender • Cleaning cloth Works With: • Mac OS X 10.4 or later • USB port • Light source from sunlight and/or indoor lighting • Internet connection (for software download) Check out the Logitech Solar App at logitech.com/k750/solarapp. Retails:$75-112 All questions and offers welcome! Smoke free home! thank you!