ENGO ETR-868 Wireless Relay Switch 230V AC DIN-Rail Receiver & Transmitter Remote Control for Boiler, Pump, Fan or Heating Systems Reliable 868 MHz Communication

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 mounting brackets included, DIN rail itself NOT supplied: Both 46x46x24mm modules clip onto standard 35mm top-hat DIN rail inside an existing consumer unit or control panel. Built in safety function: Integrated super capacitor sends an OFF signal during power loss to help prevent connected systems from running unintentionally