Features: Dimensions: 6"W x 10"D x 7"H. Mount on post or tree using the screws provided in the pre-drilled holes. Designed for easy three step training. 1.) Leave the lid open & remove the Plexiglas side. 2.) Replace the Plexiglas side after the bluebirds recognize the food. 3.) Close the lid so only bluebirds can use the feeder.