Need to get your students' attention? Save your voice and let this versatile electronic bell do the work. Simply dial one of seven unique sounds, tilt the bell and point it at your students. The crystal-clear sound gets everyone's attention. Seven fun sound effects include a hand bell, bugle call, alarm clock ring, space alert, twinkle, tick-tock alarm and applause. The No Yell Bell requires four AAA batteries (not included).