---
product_id: 368023282
title: "Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS)"
brand: "readytosky"
price: "$82.93"
currency: USD
in_stock: true
category: "Readytosky"
url: https://www.desertcart.us/products/368023282-readytosky-2-4s-40a-brushless-esc-electronic-speed-controller-5v
store_origin: US
region: United States of America
---

# 40A high current capacity 2-4S LiPo battery compatibility 5V/3A BEC output power Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS)

**Brand:** readytosky
**Price:** $82.93
**Availability:** ✅ In Stock

## Summary

> 🚁 Elevate your drone game with power and precision!

## Quick Answers

- **What is this?** Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS) by readytosky
- **How much does it cost?** $82.93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/368023282-readytosky-2-4s-40a-brushless-esc-electronic-speed-controller-5v)

## Best For

- readytosky enthusiasts

## Why This Product

- Trusted readytosky brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quad-Pack Value:** Includes 4 ESC units, perfect for upgrading or building your F450, S500, or ZD550 quadcopter fleet
- • **Stable Power Supply:** Integrated 5V/3A BEC ensures consistent power to your RC helicopter’s electronics
- • **Plug & Play Simplicity:** Highly intelligent and adaptive ESC design makes setup effortless for pros and hobbyists alike
- • **Power-Packed Performance:** 40A continuous current for smooth, reliable flight control
- • **Versatile Battery Support:** Compatible with 2-4S LiPo batteries to maximize your drone’s flight time

## Overview

The Readytosky 2-4S 40A Brushless ESC is a high-performance electronic speed controller designed for 450mm RC helicopters and quadcopters like the F450, S500, and ZD550. Supporting 2-4S LiPo batteries and delivering a stable 5V/3A BEC output, this 4-pack offers reliable, intelligent control for smooth flight experiences. Note: firmware flashing is not supported.

## Description

Buy Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS): Electric Speed Controllers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- ★40A 2-4S Brushless ESC,BEC output: 5V 3A .
- ★The applicable number of battery cells :2-4S.
- ★Use for F450 450mm S500 ZD550 RC Helicopter Quadcopter.
- ★Highly intelligent, adaptive ability, extremely easy to use.
- ★★★Note: This ESC is not able to flash the firmware.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09G5S9YYG |
| Additional Features | Portable |
| Age Range Description | Baby |
| Are Batteries Required | Yes |
| Batteries are Included | No |
| Battery Description | Lithium-Ion Polymer |
| Best Sellers Rank | #413,368 in Toys & Games ( See Top 100 in Toys & Games ) #544 in Radio Control Vehicle Speed Controls |
| Brand Name | Readytosky |
| Color | Black |
| Customer Reviews | 3.9 3.9 out of 5 stars (60) |
| Included Components | [4 x 40A ESCs] |
| Is Assembly Required | Yes |
| Manufacturer | Readytosky |
| Manufacturer Maximum Age (MONTHS) | 12 |
| Manufacturer Part Number | M15-4 |
| Material Type | Plastic |
| Model Name | M15-4 |
| Model Number | M15-4 |
| Number of Items | 4 |
| Operation Mode | manual |
| Power Source | Battery Powered |
| Set Name | 4pcs*40A ESC |
| Size | 7.2cm x 2.4cm |
| Theme | helicopter |
| Toy Vehicle Form | Helicopter |

## Images

![Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS) - Image 1](https://m.media-amazon.com/images/I/91qWZqcI0yL.jpg)

## Frequently Bought Together

- Readytosky 2-4S 40A Brushless ESC Electronic Speed Controller 5V/3A BEC for F450 450mm S500 ZD550 RC Helicopter Quadcopter(4PCS)
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**Shop now:** [https://www.desertcart.us/products/368023282-readytosky-2-4s-40a-brushless-esc-electronic-speed-controller-5v](https://www.desertcart.us/products/368023282-readytosky-2-4s-40a-brushless-esc-electronic-speed-controller-5v)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-21*