DOLFIN FReferee Whistle for basketballBest for Smaller & Quieter Audience, Standard Loudness (Easy to Blow)Tuned for Open Air StadiumPowerful sound which penetrates through a stadium in the most effective way possible4.15kHz&3.67kHz, 4 octaves..
DOLFIN FReferee Whistle for FOOTBALL, SOCCERBest for Smaller & Quieter Audience, Standard Loudness (Easy to Blow)Tuned for Open Air StadiumPowerful sound which penetrates through a stadium in the most effective way possible4.15kHz&3.67kHz, 4 octaves..