?Looking for a high quality ESC? Then don¡¯t miss our HobbyWing FlyFun 40A Brushless Speed Controller ESC Built in BEC 5V/3A (2-6S)! It is highly recommended for its safety arming feature£¬ which means no matter what position the throttle stick is at£¬ the motor will not spin even if the battery is connected. Moreover£¬ throttle range can be calibrated to fit different transmitters. This ESC is user programmable and can be programmed via transmitter stick and LED program card. Plus£¬ it is equipped with low voltage cut-off protection and overheat protection for durability. Throttle signal loss protection ensures safe flight. Don¡¯t hesitate any more!                                    Features             Safety arming feature: no matter what position the throttle stick is at£¬ the motor will not spin even if the battery is connected<br> Equipped with low voltage cutoff protection£¬ overheat protection£¬ and throttle signal loss protection<br> User programmable£¬ can be programmed via transmitter stick and LED program card<br> Compatible with Lipo and NiCd/NiMH batteries<br> Internal timing can be changed to suit different brushless motors<br> Use PCB with low resistance at power output section<br> Microprocessor uses separate voltage regulator IC to deliver good anti-jamming performance<br> Easy to install <br>                                                            Specifications             Output     Continuous 40A£¬ Burst 55A Up to 10 Seconds    <br> Input Voltage     2-6 Cells Lithium Battery or 5-18 Cells NiCd/NiMh Battery    <br> BEC     3A/5V Switching Mode    <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     (2.36 x 1.10 x 0.59)" / (6 x 2.8 x 1.5)cm (L x W x H)    <br> Weight     1.37oz / 38.8g       <br>                                                             Package Includes            1 x 40A Brushless ESC with BEC<br>