• Wireless boiler control relay: Designed for remote control of boilers and heating systems without additional wiring, ideal for retrofit installations, upgrades and extensions
• Reliable wireless relay communication: 868 MHz signal provides stable performance with reduced interference between transmitter and receiver in domestic and light commercial environments
• Volt free relay output compatibility: COM NO contacts support both 24V and 230V systems including thermostats, boilers and central heating pumps for flexible installation
• Heating and switching applications: Suitable for controlling boilers, central heating pumps, lighting circuits and other compatible devices requiring wireless on off switching
• DIN rail receiver installation: Compact receiver mounts neatly in consumer units or control panels with pre paired transmitter for fast and straightforward setup
• Built in safety function: Integrated super capacitor sends an OFF signal during power loss to help prevent connected systems from running unintentionally

The ENGO ETR-868 is a wireless relay switch set (receiver and transmitter) designed to provide reliable remote control of 230V appliances such as boilers, circulation pumps, fans, and electric heaters. Compact, versatile, and simple to install, it eliminates the need for additional wiring runs - making it an ideal solution for retrofit projects, extensions, or modern heating and plumbing upgrades. Built around 868 MHz wireless communication, the ETR-868 ensures stable, interference-free performance for demanding environments. The transmitter and receiver are factory-paired for easy setup, with the option to re-pair if required. Thanks to its volt-free relay output, the ETR-868 integrates seamlessly with a wide range of heating and plumbing systems. Safety and reliability are at the core of the design. The transmitter includes a built-in super-capacitor that sends an OFF signal in the event of power loss, ensuring pumps and connected appliances are never left running unattended. Rated at 16(5)A, the relay is suitable for most typical domestic and light commercial loads. The ETR-868 is the professional choice for electricians, plumbers, and heating engineers who need dependable wireless control without the compromises of cheaper alternatives. Typical applications include linking a thermostat to a boiler without extra wiring, switching a circulation pump from a remote location, or providing convenient wireless control for fans, heaters, or lighting circuits. By choosing ENGO, you benefit from a consistent product ecosystem, robust build quality, and trade-trusted reliability - making the ENGO ETR-868 a future-proof solution for modern electrical and heating installations.