4GHz wireless dongle, Bluetooth and wired using the Razer Speedflex cable.
See our review XTRFY M42: The XTRFY M42 is an excellent alternative to the Cooler Master MM720. It targets palm or claw grips and is Like Razer's Viper Mini mouse for claw- and fingertip-style users, the DeathAdder V2 Mini ($49.