Intended use: Applied to space heating automatic control systems. Temperature range: +5 to +40 degrees Celsius. Status indication: Indicator light on when heating is active. Installation: Mounted on an indoor wall. Key benefits: Enables automatic regulation of indoor temperature within the specified range when used with a space heating control system. Provides a clear visual indication of heating status via the indicator light. Simple indoor wall mounting supports reliable operation in typical living and work spaces. Use scenarios: Residential living room: Install as part of the space heating automatic control to maintain comfortable warmth without manual adjustments. Small office: Mount on an interior wall to sustain steady office temperatures during working hours, with heating activity shown by the indicator light. Bedroom or study: Use to keep the room within the 5 to 40 C range during colder months, with immediate feedback via the indicator when heating is active.