- Precise temperature control: 5 adjustable temperature levels allow you to fine-tune warmth in every room independently. Maintain your preferred comfort without external energy input, improving both comfort and efficiency. - M30x1.5 thread compatibility: Standard M30x1.5 mm (1.18 x 0.06 inch) threaded connection. Compatible with many radiator systems. Always verify fit before purchase to ensure seamless installation. - Durable construction: Built from a robust alloy and plastic blend, these valve heads resist deformation and damage, delivering long-lasting performance in your heating system. - Frost protection feature: Anti-freeze function helps safeguard your radiator system during colder months, providing an extra layer of protection for your home heating setup. - Practical use scenarios: - Living room: Set to a comfortable level for daytime warmth without unnecessary energy use. - Bedroom: Lower the setting for a restful night while maintaining a buffer against cold. - Home office or guest room: Independently adjust temperature to suit occupancy, enhancing comfort and efficiency.