This is a new Microsoft Wireless Laser Desktop For Mac. It uses a USB receiver, it's designed for Mac but it will also work for PC. The set includes model numbers 1078, 1052 and 1028. Model 1078 is the wireless comfort keyboard. Model 1052 is the Laser 6000 mouse , one of the nicest I've used and Model 1028 is the wireless receiver. Due to the age it was opened and the old batteries were disposed of to make sure no acid leaks or damage. I had it displayed with my old video game systems and toys for long time. The pictures are of the exact item you'll receive, please ask any questions before purchase.