There’s no need to shout when you have this voice-saving electronic bell in your hand! Simply turn the dial to 1 of 7 sound effects (clanging bell, bugle call, space alert, applause, 2 alarm clock sounds or twinkle chimes), tilt the bell and point it at your students. The crystal-clear sound begins immediately and gets everyone’s attention. Features a volume dial and a powerful, high-quality speaker that projects sound across a room. Requires 4 AAA batteries (not included).