Speedybee RadioMaster ER4 ELRS PWM Receiver: 2.4GHz 4Ch ExpressLRS Receiver Nano Module for RC Vehicles
Speedybee RadioMaster ER4 ELRS PWM Receiver: 2.4GHz 4Ch ExpressLRS Receiver Nano Module for RC Vehicles
About this item
- Revolutionary ExpressLRS System: The ER4 2.4GHz ELRS PWM Receiver is based on the revolutionary ExpressLRS system, offering high performance, high reliability, flexible configuration, fast response speed, and ultra-long range.
- Compact and Lightweight: With its small volume and lightweight design, it is perfect for small aircraft models, ship models, car models, and other models that require a compact receiver without compromising on range.
- Supports 4 PWM Channels: The ER4 PWM receiver can drive 4 servos simultaneously, providing flexibility and control for a variety of applications.
- Advanced Features: The receiver supports automatic voltage telemetry of external battery voltage or built-in receiver voltage. It also supports Wi-Fi updates and WEBUI configuration, ensuring your receiver is always up-to-date and easily configurable.
- High-Quality Components: The ER4 receiver comes with a high sensitivity 15 cm antenna and a high-quality 2.54 mm connector. It also includes heat-shrink tubes and a voltage telemetry wire for easy installation and setup.
Overview
- Brand: SPEEDY BEE
- Model Name: ER4 2.4GHz ELRS PWM Receiver
- Special Feature: ExpressLRS Communication Protocol
- Connectivity Technology: Wi Fi
- Included Components: ELRS
- Control Type: Remote Control
- Wireless Communication Technology: Radio Frequency, Wi-Fi
- Are Batteries Included: No
- Rechargeable Battery Included: No
- Number of Items: 1
Couldn't load pickup availability
15 in stock
View full details

Reviews
-
⭐⭐⭐⭐⭐
Ethan Miller — Phoenix, Arizona
I found the replacement parts I needed for my RC truck without having to search through unrelated products. The categories were easy to understand, and the new wheels and suspension parts worked well for my weekend build.
-
⭐⭐⭐⭐⭐
Marcus Lee — San Diego, California
TinyRacer has a practical selection of RC tools, batteries, and upgrade parts. I picked up several items for maintaining my crawler, and everything made my workbench setup feel much more organized.
-
⭐⭐⭐⭐⭐
Olivia Parker — Denver, Colorado
I am still fairly new to RC cars, so I appreciated how clearly the products were grouped. It was easy to compare chargers, connectors, and maintenance supplies for my first off-road vehicle.
-
⭐⭐⭐⭐⭐
Noah Bennett — Austin, Texas
I enjoy upgrading and adjusting my RC vehicles, and TinyRacer makes it convenient to browse parts for different projects. I especially liked the variety of tires, hardware, and drivetrain components available.
FAQ
What types of products does TinyRacer sell?
TinyRacer offers RC cars, trucks, crawlers, buggies, drift vehicles, replacement parts, electronics, batteries, chargers, tools, maintenance supplies, and performance upgrades for a wide range of RC projects.
How can I check whether a part fits my RC vehicle?
Review the product description for scale, dimensions, mounting points, connector type, voltage, part number, and compatible models. Similar-looking RC parts may not be interchangeable, so please confirm all specifications before ordering.
How much does shipping cost?
Standard shipping costs a flat $6.90 per order unless a different amount is displayed during checkout. Any applicable taxes or additional charges will be shown before payment is completed.
How long does order processing take?
Processing time may vary depending on product availability and order volume. Once your order has been prepared and shipped, you will receive a confirmation email with the available tracking information.
How long will delivery take?
Delivery times depend on the destination, carrier, product availability, and other shipping conditions. The estimated delivery information provided during checkout or through tracking is not a guaranteed arrival date.
How can I track my order?
A tracking link will be emailed to you after your order ships. Tracking updates may take a short time to appear after the carrier receives the package.
Can I change or cancel my order?
Contact us as soon as possible after placing your order. We will try to help, but changes and cancellations cannot be guaranteed once processing or shipment has begun.
What is your return policy?
Eligible items may be returned according to the conditions and timeframes stated in our Return & Refund Policy. Items should generally be unused, uninstalled, and returned with their original packaging and included components.
What should I do if my order arrives damaged or incorrect?
Contact us promptly with your order number, a description of the issue, and clear photos of the product, packaging, and shipping label. Our support team will review the information and provide the appropriate next steps.
How can I contact TinyRacer customer support?
You can contact TinyRacer by email at muytregerwad@gmail.com. Please include your order number when asking about an existing purchase so we can assist you more efficiently.
Blog posts
View all-
LiPo Battery Myths Busted: 5 Mistakes That Can ...
Think you know how to care for your LiPo batteries? Discover five common LiPo battery myths, learn the facts behind safe battery maintenance, and keep your RC car performing at...
LiPo Battery Myths Busted: 5 Mistakes That Can ...
Think you know how to care for your LiPo batteries? Discover five common LiPo battery myths, learn the facts behind safe battery maintenance, and keep your RC car performing at...
-
Top 5 Signs Your RC Car Differential Needs Main...
Learn the top warning signs that your RC car differential needs maintenance. Discover simple inspection and servicing tips to improve handling, drivetrain efficiency, and long-term performance.
Top 5 Signs Your RC Car Differential Needs Main...
Learn the top warning signs that your RC car differential needs maintenance. Discover simple inspection and servicing tips to improve handling, drivetrain efficiency, and long-term performance.
-
Why Your RC Car Keeps Overheating Mid-Run: A De...
Learn how incorrect gear ratios cause RC car overheating and how proper tuning improves speed, efficiency, and motor lifespan. Essential tips for balanced RC performance.
Why Your RC Car Keeps Overheating Mid-Run: A De...
Learn how incorrect gear ratios cause RC car overheating and how proper tuning improves speed, efficiency, and motor lifespan. Essential tips for balanced RC performance.