It comes with a removable tray, and it has a small door near the bottom. Thus, objectively at least, is is a fully functional birdcage. However, given that the piece has a flat back, the amount of room inside is rather limited and we can't imagine too many birds would be very happy inside. It is probably designed as a decorative piece that can easily sit up against a wall.
Measures 26.5" tall by 16" wide by 9" deep. The door measure 4" by 4.5". It weighs several pounds.