Utilizes a push button, which offers a hygienic solution for multiple operators

Provides a loud, clear and consistent sound every time

Give verbal commands without a whistle in user's mouth

Fox 40 Electronic Whistle® has three distinct tones that can be aimed in specific directions:
Off / Tone 1 / Tone 2 / Tone 3

Design: 9V battery; 4 switches, 3 tones
Sound Power: 100 dB