ESC DYS 30A Brushless Motor Speed Controller with Simonk Firmware 

Developed specifically for multi rotor use
Smooth, linear and precise throttle response
Extreme low output resistance, super current endurance
Supports high RPM motors

Burst Current                   40A for 10 sec.
Constant Current              30 A
BEC                                5V / 2A
Suitable Batteries              2~4S
Color                                 Black, Blue
Dimensions (mm) LxWxH    46 x 26 x 11
Weight (gm)                       23g
Application                         BLDC quadcopter Motors, Multirotors, Rc Planes etc.
Shipment Weight                0.02 kg
Shipment Dimensions         10 x 10 x 5 cm