Product name: professional coach referee whistle
Applicable scene: Football, Basketball, Volleyball, Professional Ball Game, Wild Adventure Call For , Rescue Command
Product color: gold, silver
Product size: about 6**.6cm / .76*0.7*1.0in, lanyard length about 8cm / .6in
This product made of safe material is safe and reliable. Dual airflow design is adopted to guarantee better sound transmission and farther transmission distance.