Requires 4 c cell batteries (not included). Selective Entry: Any pet can leave. Flap Opening Dimensions: 6 11⁄16in (W) x 7in (H). Exterior Frame Dimensions: 10 5⁄16in (W) x 11 1⁄16in (H). Tunnel Depth: 2 3⁄4in (D). Hole Dimensions: 8 1⁄8in (W) x 9 3⁄...