ReadytoSky 40A 2-4S ESC for Drone

The ReadytoSky 40A 2-4S ESC is designed especially for multi-rotor and quadcopter applications. which, in comparison to other ESCs on the market, offers faster and better motor speed control, improving flying performance.
The rapid throttle response and multi-integrated custom programme of the ReadytoSky 40A 2-4S ESC outperform any open-source software. The firmware for this ESC was specifically designed to work with a 2-4s Lipo battery and has excellent compatibility. It was integrated circuitously for the disc motor.

In order to provide more steady flying, the throttle signal line is twisted to minimise crosstalk within the transmission signal produced by the copper. This ESC is compatible with a variety of flight controllers and supports throttle signal refresh rates of up to 621 Hz. (Note: All throttle signals beyond 500 Hz are not typical throttle signals.)
The MOSFET’s ultra-low resistance allows for a high flow capacity. Performance and stability of the MOSFET special driver integrated circuit greatly outperform those of the driving circuit with built-in discrete components.

Note:

This ESC is not able to flash the firmware

Features: 
Brushless ESC with 40A OPTO 2-4S.
2-4S is the appropriate amount of battery cells.
5V/3A is the BEC output.
Use with F450 450mm S500 ZD550 Quadcopter Remote Control Helicopter.
incredibly intuitive, capable of adapting, and clever.