Hobbywing 30215001 Platinum Pro 40A V4 ESC : 300 Class Helis

Innovative Heat Dissipation Structure  
The innovative "duo" stacking structure allows all components on both sides of the printed circuit boards to quickly conduct heat to the aluminum case.

Excellent Motor Speed Governing  
The high performance 32-bit processor, combined with advanced algorithm, makes the motor speed-governing excellent for different conditions. With the adjustable sensitivity of speed-governing, every pilot can find the most suitable settings for his helicopter.

Super Soft Start-Up  
The Platinum 40A makes the motor start extremely soft and avoids tail-drift issues. The start-up time is adjustable within 8 to 25 seconds. This will definitely create a perfect starting point for every flight.

Super BEC  
The built-in switch mode BEC with a continuously adjustable output voltage, range from 5V to 8V (steps: 0.1V). It is certain to put out the power you need for rapid, precise steering servo operation.   
Great Current Endurance  
A high-quality and high-voltage MOSFET with a great current endurance guarantees the ESC's safety especially in a extremely high power demanding situation.  

Built-in Sparkproof Circuit  
Built-in sparkproof circuit effectively eliminates sparks produced at the "powering-on" moment and prolongs the connectors lifespan.  
Specifications:  
Main Applications: 300-400 Class Helis  
Governor: Internal  
Built-in BEC: Yes; Switch Mode: 5V-8V, 7A  
Continuous Current: 40A  
Cell Count: 3-4S  
Programming: LCD Program Box, WiFi Module, via Separate Program Port  
Peak Current: 60A  
Weight: 47g  
Dimensions: 48x30x15.5mm  
DEO Technology: Yes  
Spark-Proof: Yes