Microsoft 3-Button USB/PS/2 Optical Scroll Mouse (Beige) Microsoft 3-Button USB/PS/2 Optical Scroll Mouse General Features: Beige and Gray color scheme USB and PS/2 compatible 3-button design (scroll wheel acts as third button) Ultra precise optical technology PC and Mac compatible 70-inch cable length (approximate) Comfortable, ergonomic design Unit Dimensions: 1.75 x 2.5 x 4.75-inches (H x W x D, approximate) Power Specifications: