This is a 2.4GHz RF (radio frequency) presentation mouse. It's red, USB-connectable, and compact. The main unit and soft case have only been used a few times, so they are in good condition. The outer box has some wear and tear. Please check the images for the included accessories. The batteries are expired. - Model Name: ELA-MRU41 - Size: Width 32 x Depth 125 x Height 27 (mm) - Communication Method: 2.4GHz RF