Product Description
 40A ESC OPTO 2-6S Brushless ESC Electronic Speed Controller For
F450 X500 S500 ZD550 RC Helicopter Quadcopter
 
ESC Specification:
BEC: No (OPTO ESC)
Li-ion/Li0poly: 2-6S
Size: about 6.8x2.4cm(ESC with Cable)
Weight:  about 33.2g(with cable)
 
Package Included: 
1PCS 40A 2-6S ESC