Bluetooth 3.0 and 2.4G dual mode. The ingenious intelligent switch between 2.4G mode and BT 3.0 mode, ensures reliable wireless communication, you never have to worry about USB port number and lost receivers. 9-month Long Battery Life. With Rapoo's latest energy saving technology and power switch, you can use your mouse without power interruption for up to 9 months. 1000 DPI high-definition tracking engine. You’ll enjoy responsive and smooth cursor control with the 1000 DPI high-definition invisible tracking engine.