Kensington Ci70 Wireless Mouse, Optical, RF Wireless, 1000 DPI, Grey Kensington Ci70 Wireless Mouse. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1000 DPI, Buttons quantity: 2. Product colour: Grey http://peripherals.about.com/od/pckeyboardsmice/fr/KensWireless.htm Comfortable design, Fast reaction, USB receiver Struggles with operation from long distance, While thin, it is overall larger than comparable mice, Features, Great response, With some cordless mice, the wireless technology can cause a lag in response time. But this is one area where the Kensingto...... Features Great response With some cordless mice, the wireless technology can cause a lag in response time. But this is one area where the Kensington Ci70 shines. The ease with which the pointer moves across your screen makes any task easier, and it is ...