Specification:General Type WhistleFor All kinds of sports training， Games， School Stadium， Traffic light intersection， All kinds of recreational activitiesMaterial High qulity PCFunctions Loud， Practical， Cheap， Duarable， With Lanyard， easy to carryColor Red，Green，Rose，Orange，YellowDimension and Weight Product weight 5 g (1pcs)Package weight 0.2 kgProduct size (L x W x H) 5 x 2.2 x 1.8 cm (1pcs)Package size (L x W x H) 23 x 10 x 7 cmPackage Contents Package Contents 20 x Whistle