--> General Features: - Silver and black - 3-button scrolls - 27 MHz Single Radio Frequency operation - Optical technology works on most surfaces - Automatic smart sleep and wakeup functions to lower power drain - Up to 4.5-feet (1.5 meters) in operating range, under normal conditions (not through walls) - 520 dpi hardware resolution - Receiver can recharge two AAA Ni-MH batteries using only USB power (batteries not included) - Agilent optical sensor - 22 mA working current - 435 mm/s tracking speed - Working voltage (for mouse): 3VDC - 5 million cycles switch live --> Retail Package Includes: - Wireless scroll mouse - USB Recevier -->Regulatory Approvals: - FCC - CE