A Stunning 180 Birdwatching Experience The bird window feeder offering a crystal-clear design that provides a breathtaking 180 birdwatching experience. The acrylic panel has a nice curve and is very clear for visibility, providing endless entertainment and relaxation. Especially fit these who are looking to enhance their home or office with the beauty of nature. Special Designed for Single or Double Hung Windows The window birdfeeder is adjustable for single and double-hung windows up to 37" and no less than 24". It can be installed on office window, bedroom window, living room window, kitchen window and bathroom window. TIPS: Please make sure to check the type and width of the window you want to use it in before purchase.