Thermostatic Radiator Head: 2 pcs smart thermostatic radiator heads with M30 x 1.5 threaded connections, compatible with radiators that have 30 x 1.5 threaded valves. High Quality: Made from high-quality plastic and alloy materials, resistant to deformation and damage. Designed for durability and long-term performance. Temperature Sensing: Automatically responds to changes in room and heating system temperature. No fixed temperature range; adjusts dynamically based on ambient conditions. Key Features: Includes anti-freeze protection and manual temperature adjustment. Suitable for use with water, non-corrosive liquids, and non-flammable gases. Compatibility Note: Please verify that this thermostatic head is compatible with your existing radiator valve before purchase. This package includes the thermostat heads only. The control knob has a calibrated scale allowing personalized indoor temperature control. Specifications: Color: As shown Material: Plastic + Alloy Connection Thread: M30 x 1.5 Sensor Type: Liquid-filled (hydraulic) sensor Voltage Output: 230V AC; 50 Hz Set Point Range: 6–28°C Temperature Hysteresis: 1.0K Maximum Working Pressure: 10 bar Package Included: 2 x Radiator Thermostatic Heads