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   Electric Electric Speed Control (ESC) Brushless Speed Control (BL ESC) - Air/ Helis HOBBYWING Skywalker Quattro 20A x 4 4-in-1 Speed Control for Quadcopters
   Multi-rotors Electronic Speed Controller (ESC)  
HOBBYWING Skywalker Quattro 20A x 4 4-in-1 Speed Control for Quadcopters
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  Tags: skywalker quattro  hobbywing 


4-in-1 ESC from famous manufacturer specially designed for quadcopter application.

1. 4 speed controllers in1board, only 1 pair of battery wire is needed.
2. Powerful switch mode built-in BEC (the BEC voltage outputs from the S3 connector).
3. Multiple protection features: Low voltage cut-off protection / over-heat protection / throttle signal loss protection.
4. The throttle range of each ESC can be calibrated to be suitable for different multi-rotor flying control systems / transmitters.
5. Maximum speed: 210000 RPM (2 poles motor), 70000 RPM (6 poles motor), 35000 RPM (12 poles motor).

MAX PWM input up to 432Hz, and during real test, it works without any problem with flight controls like DJI which claims with max PWM of 500Hz.
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