ADJUSTABLE FIT FOR MOST WINDOWS Fits window openings from 39 cm to 189 cm in width, making it suitable for both vertical and horizontal window installations. Comes with a power supply for immediate use, ideal for residential, kitchen, or light commercial ventilation needs. RETRACTABLE DESIGN FOR SECURE PLACEMENT Features a 10 cm retractable mechanism with a threestage caliper clamp and a reinforced spring system. This ensures a firm, stable attachment to the window frame, providing safe and reliable operation during use. DURABLE DOUBLESIDED STAINLESS STEEL MESH Equipped with stainless steel mesh plating on both sides to effectively keep out insects such as mosquitoes while allowing airflow. Childsafe construction, waterproof and resistant to sun damage, offering dependable performance in both hot summer weather and rainy conditions. TOOL, PUNCH INSTALLATION Designed for quick setup without the need for drilling or tools. The vertical window fan structure fits securely onto window edges without interfering with normal opening or closing functions. PRACTICAL APPLICATIONS Home kitchen ventilation to remove cooking odors and improve indoor air quality without complex installation. Office or store use where quick and portable window ventilation is required without altering the property structure. Seasonal ventilation for apartments, helping to cool spaces in summer and expel moisture in rainy weather. Materials: Stainless steel mesh and durable frame components ensure longlasting performance. Dimensions: Adjustable length from 39 cm to 189 cm, retractable depth 10 cm. Installation: Secure clamp and spring lock system, tool setup. Usage: Suitable for various window types and environments demanding efficient airflow with insect protection.