Speedybee ER4 ELRS PWM Receiver — 2.4GHz ExpressLRS, 4 PWM Channels, Nano Module

Discover the Speedybee ER4 ELRS PWM Receiver, a compact 2.4GHz module built for reliability and fast response in RC setups. Based on ExpressLRS, it balances high performance with flexible configuration to suit a range of vehicles from tiny drones to model boats and ground machines.

Performance you can feel

Designed for responsive control, ER4 balances power and precision. The ExpressLRS ecosystem supports ultra-long range, low latency, and robust signals, helping you fly or drive with confidence across complex layouts and windy days.

• 2.4GHz ELRS technology for fast binding and low-latency links
• 4 PWM channels allow simultaneous control of four servos or devices
• Compact, lightweight footprint ideal for small airframes and micro vehicles

Flexible, maintenance-friendly features

Beyond core control, the ER4 includes smart telemetry, easy updates, and straightforward setup to keep your system current without hassle.

• Automatic voltage telemetry for external batteries or built-in power
• Wi-Fi updates and WEBUI configuration for quick adjustments
• High-sensitivity 15 cm antenna and a durable 2.54 mm connector

Practical installation details and included components support a smooth setup. The kit comes with heat-shrink tubes and a voltage telemetry wire, making mounting tidy and simple. A compact profile means you can keep your electronics tucked neatly into tight spaces while preserving range and performance.

Real-world use cases

Whether you're outfitting a tiny FPV plane, a small boat, or a compact ground vehicle, the ER4 offers a consistent link and flexible routing options. This receiver is designed to slot into diverse builds where space is at a premium but reliability matters.