Handheld Electronic whistle can produce 120 decibels of sound, no matter how noisy it is, you can hear the whistle clearly. Four button cell batteries needed for power supply. This whistle is great for refereeing, when you feel threatened, or for use as a police officer. And the Handheld Electronic whistle can be used at a party or celebration! Your logo or brand can be imprinted on it. 5.4" L x 1.5" W
