Powerful sound which penetrates trough a stadium in the most effective way possible. DOLFIN F whistle's rich, sharp, high pitched tone reaches every corner of the pitch, overcoming the deafening roar of a football stadium.

• Referee Whistle for FOOTBALL, SOCCER
• Best for Smaller & Quieter Audience, Standard Loudness (Easy to Blow)
• Tuned for Open Air Stadium
• Powerful sound which penetrates through a stadium in the most effective way possible
• 124dB/10cm, 4.15kHz & 3,67kHz, 4 octaves