Hobbywing SKYWALKER Series 2-6S 40A Brushless ESC Speed Controller With UBEC For RC Quadcopter

1 Output capability: continuous current 40A, short-time current 55A(not less than 10 seconds); 2 Power input: 2-3 lithium batteries or 5-9 nickel-hydro/nickel-cadmium batteries; 3BEC output: 5V@3A(Linear mode-linear mode); 4 Maximum speed: 210,000 pole Motors per minute, 70,000 pole Motors per minute, and 35,000 pole Motors per minute; Size: 68mm(long) * 25mm(wide) * 8mm(high); 6 Weight: 39g