Apple Mighty Mouse A1152 Wired USB Features & details • Optical, USB 2.0 (compatible with USB 1.1) mouse • Touch-sensitive technology concealed under the seamless top shell, you get the programability of a four-button mouse in a single-button design • Force-sensing side buttons • Revolutionary 360 degree Scroll Ball lets you move anywhere inside a document, without lifting a finger • Compatible with Mac OS X (programmability requires Mac OS X v10.4.2 Tiger or later), or Windows 2000 or Windows XP Condition is preowned and may indicate signs of use, but otherwise in good preowned condition Measurements are approximate please see pictures Questions? Leave a comment below!