DESIGN FOR VENT & GRILLE MOUNTING VENTILATION- Great for refrigerator vent & grille ventilation in your motorhome, camper van, camper truck, caravan or any cabinets. FLEXIBLE AND SMART SPEED CONTROL MODE- Auto Temperature Control/ 6-levels manual controller to adjust for particular needs ALL WEATHER ACCEPTABLE- IP 55 Waterproof &dustproof fan, perfect for outdoor use EASY INSTALLATION- Rack hook design for easy install on refrigerator vent FREE REPLACEMENT GUARANTEE: The best customer service! We guarantee free to offer a replacement of new fan regarding the shipping problem or any uncontrolled product defaults and situations. Please feel free to contact us. Do not hesitate to order and give it a try now.