Powerful Suction Cups--The window bird feeder comes with 4 strong suction cups, so it won't fall off even if many birds are eating at the same time. Bird feeder window suction cups are suitable for all kinds of smooth wall glass. One-piece Design-The window bird feeder is beautifully designed and suitable for viewing. The one-piece design solves the problem of easy separation of the top and sides of ordinary acrylic bird feeders. The suction cup bird feeder window detaches easily. Assembly and installation. You can place window-mounted bird feeders indoors or outdoors. The perfect bird feeder gift for kids, cats and the elderly. Easy to Clean and Fill--The transparent bird house tray adopts a removable design, which is easy to remove and clean. There are small drainage holes at the bottom of the bird feeder, which can effectively drain the water in the tray after rain or snow, keeping the tray dry and the birds' food dry and fresh. COMFORT AND SAFETY--Our window bird feeders are designed with the safety and comfort of birds in mind. Rounded corners do not have any sharp edges or points. Provide a better home for your bird pets! Environmentally Friendly Material--We upgraded the material quality of the window bird feeder with thickened environmentally friendly plexiglass. Transparent birdhouses are heat-resistant and have a long lifespan