Switch between Bluetooth 3.0, 4.0 and 2.4GThe smart switch between Bluetooth 3.0, 4.0 and 2.4G ensures stable wireless transmission. You can still use your mouse regardless of USB port shortage or the loss of receiver.Intelligently switch among multiple devicesM300 intelligently connects to the working device. It simultaneously connects to up to 3 devices, and switches among them with ease. It simplifies complicated cross-platform use and meets multi-tasking requirements.Adjustable High-definition Tracking EngineAdjustable High-definition Tracking Engine Choose from low DPI for accuracy or high DPI for fast movement, you can instantly switch between 600/1000/1300/1600 DPI.Up to 9 months battery lifeWith Rapoo's energy saving technology and power switch, you can use your mouse without power interruption for up to 9 months.