Need to get your students' attention? Save your voice & let this versatile electronic bell do the work. Simply dial one of seven unique sounds, tilt the bell & 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 & applause. The No Yell Bell requires four AAA batteries (not included).