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Radiomaster ER4 4CH ELRS Receiver

Name: Radiomaster ER4 4CH ELRS Receiver - Flying Tech
Brand: RadioMaster
SKU: ELRS-RX-ER4
Price: 14.99 GBP
Availability: InStock
Rating: 5.00 (1 reviews)

Rated 5.00 out of 5 based on 1 customer rating

(1 customer review)

£14.99 Inc. VAT

The ER4 is an ELRS receiver with 4 PWM outputs and voltage monitoring input.

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SKU: ELRS-RX-ER4 Categories: ELRS Receivers, Radio Control, Long Range RC, ExpressLRS Tags: ELRS, ER-Series, ExpressLRS, PWM, Receiver

Description

The ER4 PWM receiver can drive 4 servos simultaneously. Designed with a very small volume, it is suitable for small aircraft models, ship models, car models and other models that require a small or lightweight receiver while still providing full range.

The RadioMaster ER series of PWM receivers are based on the revolutionary ExpressLRS system. It offers high performance, high reliability, flexible configuration, fast response speed and ultra-long range bringing you brand new experience with your hobby.

Features

Based on the Revolutionary ExpressLRS System
High performance, high reliability, flexible configuration, fast response speed and ultra-long range
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 small aircraft, boats and cars and more

Specification

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: 30x15x5mm
Firmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER4 2400 PWM RX

Included

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

Downloads

Manual (pdf, 2828KB)

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Videos

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1 review for Radiomaster ER4 4CH ELRS Receiver

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Verified owner turbine (verified owner) – 11/02/2025

Rated 5 out of 5
The right size for my 450 helicopter sbus to brain 2

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Shipping

SHIPPING & DELIVERY

We are based in the UK, but ship to most worldwide destinations. Postage rates are calculated by the size/weight and shipment location. We process orders Monday to Friday and pride ourselves on our quick turnaround of orders - most UK orders will arrive the next day.

We are partnered with several delivery companies including Royal Mail, DHL, UPS and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection please contact us.

A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.

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Shipping to the UK

Order before 4PM for same day dispatch with Royal Mail, 2PM for next day delivery with DHL and 1PM for next day delivery with APC.
We offer FREE Shipping on UK orders over £99, weighing less than 1kg.
The courier options deliver Monday to Friday, Royal Mail delivers to residential addresses on Monday to Saturday.

For small low value orders our cheapest delivery service is Royal Mail First Class. For a guaranteed next day delivery we recommend Royal Mail Special Delivery or one of our courier delivery options.

International Postage

Order before 4PM for same day dispatch with Royal Mail.
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DHL Express offers NEXT DAY delivery to most European destinations and a very fast delivery for countries further afield, generally 2-3 days.

Orders shipped outside the EU may be subject to customs charges. These charges are additional to any delivery costs and will need to be paid by the recipient.

Radiomaster ER4 4CH ELRS Receiver

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