Intelligent switching between Bluetooth 3.0, 4.0 and 2.4 GHz enables stable wireless transmission. You can use your mouse without a free USB port and without a receiver. MT550 connects intelligently with the running device. It simultaneously connects to up to 4 devices and effortlessly switches between them. It simplifies complicated cross-platform deployment and meets multitasking requirements. You can adjust 4 dpi values from 600/1000/1300/1600, up to 1600 dpi, to meet the accuracy of different displays. Rapoo's latest energy-saving technologies let you use your mouse for up to 12 months without changing batteries.