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AUTOMATIC WINDOW CONTROL: This automatic window actuator features remote control operation and a 400mm electric chain drive design, providing a convenient solution for opening and closing compatible windows, skylights and roof vents. WIRELESS RAIN SENSOR FUNCTION: Equipped with a wireless rain sensor, this electric window opener can detect rainfall conditions and automatically close the window when rain is detected, helping manage ventilation openings more conveniently. 400MM CHAIN ACTUATOR DESIGN: The 400mm stroke chain mechanism provides reliable window movement for compatible installations, making it suitable for skylights, greenhouse windows, roof vents and ventilation systems. REMOTE & SMART OPERATION: The remote control design allows users to operate the window opener easily from a distance, providing flexible ventilation management for homes, offices, greenhouses and other spaces. VERSATILE VENTILATION APPLICATION: Suitable as an automatic window opener, electric window actuator and chain window opener for skylight windows, greenhouse ventilation, roof vents and indoor air circulation systems.