B&A CAN-902W Classic RF2.4GHZ Wireless Optical Mouse with Mini USB Receptor 1.	Mini receptor that is so small, it can be plugged in and forget. When using with a laptop, the receptor is so small that it can be plugged in and forget. It becomes unnecessary to remove the receptor when carrying the laptop in a laptop bag. 2.	Mouses ergonomic shape offers user a nice and comfortable hand grip. 3.	Mouse uses high radio frequency transmitting technology: 2.4GHz radio frequency transmitting solution offers a reliable and consistent wireless connection up to 10 meters. 4.	DPI button (Adjustable DPI for different display resolution): Mouse has 2 DPI setting, 800 DPI and 1600 DPI. User may set the mouse DPI according to the screen display resolution. Higher screen display resolution will require a higher 1600 DPI setting, and for a medium screen display resolution, 800 DPI will work nicely. 5.	Manual power switch: Wireless Mouse has a manual power switch. Power can be manually switched off when carrying the mouse in a laptop bag.