Vertical Sliding Window Vent Fan, with Speed Controller 61.02 * 62.99in | Retractable, No Need to Drill Holes, Embedded Installation, Ultra-quiet, for Home Attic Kitchen Buthroom Garage

Window-type exhaust fan, 5cm retractable, adjustable speed from 0-2800 RPM, suitable for vertical ventilation in homes, kitchens, bedrooms, living rooms, etc. Product Features: - Drill-free installation, easy to move between rooms. - High-speed fan at 2800 RPM keeps indoor air fresh. - Low-noise reluctance brushless motor. - Does not interfere with normal window opening and closing. - Adjustable power supply for flexible airflow control. - Easy to disassemble and clean. Can be used even in rainy weather. Technical Specifications: Name: Window Exhaust Fan Input Voltage: 110-220V Output Voltage: 12V Current: 0.35A (peak single fan) Speed: 0-2800 rpm (adjustable) Airflow: 98 CFM (single fan) Noise: 16-39.8dB (varies with speed) Bearing: Magnetic bearing Material: Aluminum alloy frame + stainless steel mesh cover Size: Optional Package Contents: Exhaust Fan x 1 Power Adapter x 1 Instruction Manual x 1

• Powerful Exhaust & Ventilation for Fresh Indoor Air: Effectively removes indoor heat, humidity, cooking fumes, and pet odors. It ensures continuous airflow and improved air quality, creating a comfortable living environment year-round. Ideal for poorly ventilated rooms, kitchens, and apartments
• External Speed ​​Controller & Versatile Application: Comes with a separate wall-mountable speed controller for flexible airflow adjustment. The energy-efficient, low-power motor supports continuous, long-term operation. Suitable for bedrooms, living rooms, apartments, kitchens, and home offices to effectively enhance indoor ventilation
• Ultra-Quiet Operation (≤35dB) for Peaceful Sleep: Features a quiet fan core with an operating noise level below 35dB (quieter than a normal conversation). Delivers a powerful airflow of up to 98 CFM for efficient circulation without annoying noise—perfect for all-night use in bedrooms or home offices
• Drill-Free Spring Installation – Renter-Friendly: Installs in minutes without tools. The built-in telescopic spring securely holds the slim unit within the gap of vertical or horizontal sliding windows (max width: 5cm / 1.97 inches). No drilling or window frame damage; fully removable, making it an ideal choice for renters
• Washable Filter & Slim, Space-Saving Design: The front/rear covers and dual dust filters are detachable and water-washable, effectively blocking pollen, dust, and insects to keep indoor air clean. The slim vertical profile fits perfectly in window gaps without obstructing the view, featuring a minimalist, stylish look that complements modern home decor