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View compareFrequently Asked Questions
- Q: What are the dimensions of the Speedybee RadioMaster ER4 ELRS PWM Receiver? A: The receiver measures one point four six inches in length, zero point seven five inches in width, and zero point five one inches in height.
- Q: What type of technology does the ER4 ELRS PWM Receiver use? A: The receiver utilizes the revolutionary ExpressLRS technology, providing high performance and ultra-long range for various applications.
- Q: What channels does the ER4 PWM Receiver support? A: It supports four PWM channels, allowing for simultaneous control of four servos in your RC vehicles.
- Q: How do I configure the Speedybee ER4 Receiver? A: You can configure the receiver via its web interface or using Wi-Fi updates, making it easy to adjust settings as needed.
- Q: Is the Speedybee RadioMaster ER4 lightweight? A: Yes, it is compact and lightweight, making it ideal for small aircraft, ships, and cars without sacrificing range.
- Q: How do I install the Speedybee ER4 Receiver? A: Installation is straightforward; it comes with a high-quality connector and includes heat-shrink tubes and telemetry wires for easy setup.
- Q: Can I use the Speedybee ER4 Receiver with different types of RC models? A: Yes, it is versatile and can be used with various models including aircraft, ships, and cars, thanks to its compact design.
- Q: What special features does the Speedybee ER4 offer? A: It features automatic voltage telemetry for battery monitoring and supports Wi-Fi updates for easy configuration.
- Q: What materials are used in the construction of the ER4 Receiver? A: The receiver includes a high sensitivity antenna and a durable two point five four millimeter connector.
- Q: How do I care for the Speedybee RadioMaster ER4 Receiver? A: To maintain the receiver, ensure it is kept dry and clean, and periodically check the connections for any wear or damage.
- Q: What should I do if the receiver arrives damaged? A: If the receiver arrives damaged, contact customer support immediately to initiate a return or exchange process.
- Q: Is there a warranty for the Speedybee ER4 Receiver? A: Yes, the Speedybee ER4 Receiver typically comes with a manufacturer warranty; check the packaging for specific details.
- Q: Can I update the firmware of the Speedybee ER4 Receiver? A: Yes, you can update the firmware through Wi-Fi, ensuring the receiver has the latest features and improvements.
- Q: What types of batteries can I monitor with the ER4 Receiver? A: The receiver supports telemetry for monitoring external battery voltage or its own built-in receiver voltage.
- Q: Is the Speedybee ER4 Receiver suitable for beginners? A: Yes, its user-friendly configuration options make it suitable for both beginners and experienced users in the RC community.
- Q: How do I troubleshoot my Speedybee ER4 Receiver if it’s not working? A: If experiencing issues, check all connections, ensure the firmware is updated, and refer to the user manual for troubleshooting steps.

