Eurotronic Stella R EnOcean (A5-20-06) Radiator Thermostat
Eurotronic Stella R EnOcean (A5-20-06) Radiator Thermostat. EnOcean 868 MHz EU, profile A5-20-06; M30 × 1.5 mm valve thread, two AA batteries. Requires an EnOcean-compatible controller, not a Z-Wave-only hub.