Original ZTW Flash 30A ESC 2-4S BLHELI-S OPTO Brushless Speed Controller for QAV250 Racer 250 ZMR250 F330 F450 FPV Racing Quadcopter

Features:
Using BLHELI-S firmware.
Super smooth and accurate throttle linearity.
Support high RPM motors, can be matched with most of the motors in the RC market.
Use new generation of the MOSFETs to make the ESC low heating and high reliability.
Capable of ONESHOT42/ ONESHOT125O/MULTISHOT feature to work better with your flight controllers.
Fast response to throttle.
No settings needed, just plug and play.