Auawak Rapoo 6610 Bluetooth and 2.4G Dual Mode Ergonomic Wireless Mouse With Optical Engine for Laptops Desktops and PC - Black The ingenious intelligent switch between 2.4G mode and Bluetooth 3.0 mode, ensures reliable wireless communication,you never have to worry about USB port number and lost receivers. With Rapoo's latest energy saving technology and power switch, you can use your mouse without power interruption for up to 9 months.interruption for up to 9 months. Enjoy accurate and smooth cursor control with the 1000 DPI high-definition invisible tracking engine. Design and durability combined in one device. The mouse feels comfortable and the design looks stylish. So small and unobtrusive, you can plug it into a USB-port and forget about it. No more worries about lost receivers.