Bornd E200 Wireless Mouse, Silver: * US cypress RF chipset * Cellular techonology, multipoint interconnection * Buttons: 3 (left, right, scroll) * Operation range: 30", 360 degrees * Resolution: 1000/2000DPI * Tracking method: optical * Operating voltage: 1.5V * Operating current: 7mAh * Dimensions: 4.0" x 2.2" x 1.2" * Operating current: 5V DC 30mAh * Interface: USB 2.0 * Dimensions: 0.7 x 0.6 x 0.2 inch * Compatibility: Windows 98SE/2000/ME/XP/Vista/7/8/Mac OS * Color: silver * Weight of mouse and package: 0.569 lbs * 1x AA alkaline battery (Included)