TOOGOO(R) Black Plastic Pealess Finger Grip Sports Referee Whistle Pealess fingergrip whistle with low pitched tone Fail - safe design eliminates the pea, creating a high-pitched penetrating, omni-directional sound No moveable parts to jam, break or freeze First choice of sports organizations worldwide - including the NFL, NCAA, NBA, CFL FIBA and FIFA Cuts through ambient noise far more effectively than traditional whistles