Readytosky 30A ESC 2-6S OPTO Brushless Electronic Speed Controller for F450 S500 ZD550 RC Helicopter Quadcopter(4PCS)

30A OPTO 2-6S Brushless electronic speed controller.

Highly intelligent, adaptive ability, extremely easy to use;

Continuous Current: 30A Weight: 28.5g.

Specifically optimized firmware ESC, the ESC has a very good compatibility.