【Easy to use】You can find a detailed installation video on the details page. You will receive 6 pieces repellent windmill.The diameter of the windmill after assembly is 24cm/9.4inch,high 50cm/20inch. 【Bird repellent windmill working principle】Our windmill garden uses the movement of wind and light reflection to keep birds away, even in light wind, the windmill rotates spirally while reflecting light at multiple refraction angles, deterring birds and protecting your garden , yard and lawn. 【Application】The Bird Repellent Reflective Windmill is both practical and decorative, which can protect your farmland, orchard, balcony, garden and lawn, perfectly match any home or garden decoration. 【Durable】Made of high quality plastic, not easy to age, sunproof and waterproof, even in sunlight or rain, it can remain reflective for a long time and stand stably in the wind. 【Safe and environmentally friendly】The extra shiny wind wheel is made of reflective laser plastic. It works well, but does not harm any animal in any way. Therefore, it is an animal-friendly tool to deter birds.