?The Original HOBBYWING Platinum Pro 30A 2-6S Speed Controller ESC OPTO for DJI Flame Wheel F450 F500 F550 Multicopter Quadcopter ESC is further optimized for multirotor applications£¬ definitely your ideal choice! Built with a high-performance micro-processor£¬ it features excellent compatibility and high motor drive efficiency. And it is equipped with low voltage cutoff protection£¬ overheat protection£¬ and throttle signal loss protection to ensure aircraft safety. Plus£¬ this ESC is user programmable£¬ which means players can program it via transmitter stick£¬ digital LED program card£¬ LCD program box£¬ or PC software. Have a try!                                    Features             Built with a high-performance micro-processor<br> Excellent compatibility£¬ high motor drive efficiency<br> Further optimized for multirotor applications<br> Smooth£¬ linear£¬ quick and precise throttle response<br> Equipped with low voltage cutoff protection£¬ overheat protection£¬ and throttle signal loss protection<br> The firmware of ESC can be updated through built-in USB adapter in the professional LCD program box<br> User programmable<br> Can be programmed via transmitter stick£¬ digital LED program card£¬ LCD program box£¬ or PC software <br>                                                            Specifications             Output     Continuous 30A£¬ Burst 40A Up to 10 Seconds    <br> Input Voltage     2-6 Cells Lithium battery or 5-18 Cells NiMH Battery    <br> BEC     Not Available    <br> Refresh Rate of the Throttle Signal     50Hz-432Hz    <br> Max Speed     210000rpm for 2 Poles BLM£¬ 70000rpm for 6 Poles BLM£¬ 35000rpm for 12 Poles BLM (BLM = Brushless Motor)    <br> Dimensions     (2.17 x 0.98 x 0.47)" / (5.5 x 2.5 x 1.2)cm (L x W x H)    <br> Weight     1.09oz / 31g       <br>                                                             Package Includes            1 x 30A ESC<br>