QWinOut 40A Brushless ESC 2-4S Speed Controller with 5V 3A BEC for Fixed Wing DIY RC Multi-Axis Aircraft Drone Helicopter Quadcopter (4 Pcs, Short Cable)

- Safety arming feature: Regardless the throttle stick position, the motor will not spin after battery connected.
- Throttle calibration funtion: Throttle range can be calibrated to be compatible with different transmitters.
- User programmable. Multiple procedure methods supported: transmitter stick, LED procedure Card. Very easy to procedure the ESC at home or at the flying field.
- Compatible with Lipo and NiMH battery. Timing can be changed to be suitable for different brushless motors.
- Full protection: Low voltage cutoff protection / Over-heat protection / Throttle signal loss protection.