- Measures 2″ x 1″ x 1″.
- As used in FIFA Internationals, F.A. & Champions League Matches FIMBRA & FINA Matches.
- Two high pitch frequencies for loudness close to the whistle and a lower pitch for distance all sound simultaneously.
- One piece durable black composition construction.
- Recommended for a big stadium or anywhere real power is required.
- Keyring attachment.