It features ESP wireless technology* and is available in 120mm radiator and 240mm radiator variants.Maestro E.S.P.Lastly, we have the Maestro E.S.P., a device which automatically detects all ESP enabled products in the PC. It can ???control and monitor up to 3 fans, water pumps or other devices that are powered by a 3 or 4 pin fan header??? and is bundled with a software for windows XP (and above)