The Hobbywing XRotor Micro 45A 4-in-1 ESC and Flight Controller Combo is highly integrated with the latest features and hardware designs, as well as incredibly compact. Featuring upgraded 45A x4 ESC, 3rd-generation BLHeli-32 firmware support and a voltmeter module that allows the flight controller to monitor battery voltage and amperage in real time. Included with this combo is an updated F7 Flight Controller featuring OSD, and voltage monitoring. This powerful combo is a high performance and convenient way to complete your next FPV build.