Holds up to 64 bats. 2 chambers. Built-in grooves on back panels for perching. Sturdy pine construction. 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.