Automatic window actuator with adjustable stroke from 300mm to 900mm, ready for immediate use after installation. Constructed with an aluminum alloy frame for enhanced durability and corrosion resistance, supporting various installation methods. Features a built-in anti-rust metal chain that provides powerful thrust while saving space. Equipped with a high-quality silent motor for low noise operation and high stability, ensuring minimal disturbance. Includes built-in overload protection to safeguard the device from damage during use.