Let their voices be heard! The Green megaphone by Gorilla Playsets easily mounts to any 2? x 4? with the included brackets. The 3? diameter base (without the brackets) can also be flush-mounted on any surface 4? x 4? or larger. The megaphone is UV-protected to help prevent fading and to keep cooler on hot days. The plastic sturdy construction will withstand years of outdoor use.