40A Speed Controller Brushless ESC Drone Helicopter FPV Parts Multicopters Durable Components RC Toys Quadcopter Accessories as shown

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.

Full protection: Low voltage cutoff protection / Over-heat protection / Throttle signal loss protection.

User programmable. Compatible with Lipo and NiMH battery. Timing can be changed to suit for different brushless motors.

Multiple procedure methods support: transmitter stick, LED procedure Card. Very easy to procedure at home or in flying field.