Miš Logitech M185 Wireless 93.00Kn Interface USB Device Type Mouse Wireless Radio Frequency Tracking Type Optical General Features Scroll Wheel Mouse Power Source AA Interface Connection USB Warranty Information 3 Year Limited More Info URL http://www.logitech.com Design Symmetrical Pointing Device Features Contour Green Compliance Yes Number of Batteries Support 1 Number of Total Buttons 3 Wireless Operating Frequency 2.40 GHz