Fox 40 Soccer Rugby Coach Referee Accessory Electronic Whistle With Lanyard Fox 40 Soccer Rugby Coach Referee Accessory Electronic Whistle With Lanyard A push of a button provides a loud, clear and consistent sound. Offers a hygienic solution for multiple operators. Three distinctive tones that can be aimed in specific directions. Sound power: 125 dB. Includes detachable wrist loop lanyard and 9-volt battery