RadioMaster

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RadioMaster - ER4 2.4GHz ELRS PWM Receiver

The RadioMaster ER series of PWM receivers is built on the innovative ExpressLRS protocol. It provides high performance, dependable signal, versatile configuration, and quick response time, offering a new experience for your projects and applications.

The ER4 PWM receiver can drive 4 servos simultaneously. Designed for a very small volume, it is suitable for any application that requires a small or lightweight receiver while still providing full range.

Features

Based on the Revolutionary ExpressLRS System
High performance, high reliability, flexible configuration, low latency, and strong link quality
Support 4 PWM Channel
Optimized ground up PCB design
Automatically voltage telemetry of external battery voltage or built-in receiver voltage
Supports Wi-Fi updates and WEBUI configuration
High quality 2.54 mm connector
Standard 15 cm High Sensitivity Antenna
For any application that requires a small or lightweight receiver
Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS

Specifications

Item: ER4 2.4GHz ELRS PWM Receiver
Power supply: DC 4.5 - 8.4V
Antenna type: 15cm high sensitivity antenna
Wireless protocol: ExpressLRS 3.3.0 pre-installed
Output channel: 4CH PWM
Telemetry power: 10mw
Battery voltage detection range: DC 4.0- 35V
Weight: 3.0 grams
Dimensions: 30*15*5mm
Firmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER4 2.4GHz PWM RX

Size

Package Includes

1 * ER4 2.4GHz ELRS PWM Receiver
2 * Heat-shrink tube
1 * Voltage telemetry wire (Type-A)
1 * User Card

ER4 Receiver is installed with ExpressLRS as standard.

ExpressLRS is an open-source, high-performance radio control link that delivers exceptional range and low-latency communication using advanced LoRa technology. It's highly customizable and perfect for RC enthusiasts looking for reliability and efficiency.

Pair your ExpressLRS with Radiomaster's top-tier transmitters and receivers. Radiomaster products are designed to maximize the benefits of ExpressLRS, offering state-of-the-art performance for your RC adventures. Upgrade your RC experience with the unbeatable combination of ExpressLRS and Radiomaster—engineered for excellence and tailored for you.

Find out more about ExpressLRS here

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Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.