Roamwild Pest Proof Bird feeder is automatically squirrel proof, there are no settings to adjust. Stop squirrels, large birds & rats stealing your precious bird food. Watch demo video at HOMGAR. Ideal for any mixed seed mix, great for feeding sunflower hearts and dried mealworms etc... Safe and humane. Unlike other squirrel proof bird feeders, the clever design of the Roamwild Pest-Off Bird feeder actually denies squirrels & rats easy access onto the feeder. When a large bird, squirrel or rat lands on the perch, the perch hatch moves downwards blocking off access to the food. Once the large pest has alighted from the perch, the perch hatch automatically returns to its open position awaiting for the next songbird to feed, or to stop the next pest! Each of the 2 feeding ports are individually spring loaded and shut out larger birds like pigeons, jackdaws and magpies, rats and squirrels. It has been designed by an ex-dyson designer, so has been tested thoroughly so it works! The design is easy to fill and comes apart quickly to allow easy and regular cleaning. Unlike most bird feeders, above each seed port is a weather protection guard feature that prevents rain entering the seed ports. This keeps the seed dry preventing any seed clogging, a common problem in most feeders. With a large 1.5 liter capacity this feeder is maintenance friendly and will not need topping up every day. The Roamwild Pest-Off feeder is popular with a wide range of different garden bird species. It has a non-spill lip feature to prevent seed easily falling out if bashed by large birds or squirrels. Tough chew-proof 304 grade stainless steel seed port protection plates prevent any chewing and pecking damage, and with the UV stabilized plastic, both materials shrug off ALL weather. Perfect for any size of garden, the Pest-Off feeder is ideal for use with sunflower hearts or any mixed seed. For extra peace of mind the feeder is backed by a guarantee.