Bornd T100 Touch Mouse, Black: * US cypress RF chipset * Cellular techonology, multipoint interconnection * 2 years battery life with normal use * Power saving function * Portable, smart and ultra thin wireless touch mouse with ergonomic design * Buttons: 2 * Operation range: 30" * Resolution: 1000/2000DPI * Operating voltage: 3V * Operating current: 3.8mAh * Input current: 5V DC 30mAh * Interface: USB 2.0 * Compatibility: Windows 98/2000/XP/ME/Vista/7/8/Mac OS * Color: black * Weight of mouse and package: 0.586 lbs * 2x AAA alkaline batteries (Included)