The RUSH BLADE 60A 3-6S BLHeli_32 4-in-1 ESC EXTREME Edition by RUSHFPV features, front & back special process aluminum shell, 200MHz F4 processor with BLHeli_32 Firmware, 128K PWM FREQ the Extreme edition of the Blade ESC from RushFPV is even more powerful than it's Super edition brother. When you absolutely, positively need the fastest response times from your quad, accept no substitute!