ReadytoSky 40A 2-4S ESC for Drone

QUICK OVERVIEW

1. 40A OPTO 2-4S Brushless ESC.
2. The applicable number of battery cells:2-6S.
3. BEC output: 5V 3A.
4. Use for F450 450mm S500 ZD550 RC Helicopter Quadcopter.
5. Highly intelligent, adaptive ability, extremely easy to use.