Holds up to 24 bats. Built-in grooves on back panel for perching. Sturdy pine construction with metal roof. For best results mount at least 15' / 3m high on an unobstructed pole or building rather than a tree. Face south to southeast to gain exposure to at least 6 hours of direct sunlight. Bat house should be free from obstructions with at least 20' of open space around the bat house.