FB35 comes with dual mode -- Bluetooth mode and 2.4GHz Wireless mode, which bring quick response, precise movement, stable connection & smoother tracking. Bluetooth 4.0/3.0/2.4G FB35 comes with dual mode -- Bluetooth mode and 2.4GHz Wireless mode, which bring quick response, precise movement, stable connection & smoother tracking. Switch up to 4 Devices 4 Devices can be connected at the same time. It realizes free switches between 3 devices only by one click. 2 Thumb Side Buttons The side buttons are preset as backward and forward functions, and can be customized with software. 2000 DPI 4-Level Adjustable Adjustable resolution 800-1000-1600-2000 DPI. 16-in-One 16 gestures to perform selectable hotkey commands. On/Off Power Switch Switch button on the back make this wireless mouse to perfect on-the-go companion.