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Specifications:
•USB 2.0, backward compatible with USB 1.1
•Supported System: Windows 98SE, ME, 2000, XP, Vista, Windows 7 or Latest
•Sensitivity: Adjustable from 800-1200 DPI.
•It is automatically power saving design, the life span of the battery is much longer.
•Free controling range: Within 10 meters (30 Feet)  
•Weight: 0.12kg