Electronic Whistle. The electronic button whistle helps avoid mouth contact, making it ideal for referees, coaches, P.E. teachers, military personnel, outdoor camping, sports events, traffic control, pet training, and personal emergencies. Features 3 sound modes and 3 volume levels to suit various needs. High-output design delivers up to 120-150 decibels, providing a louder, stronger, and more consistent sound than traditional whistles. Built-in LED light serves as a flashlight for outdoor use and includes SOS signal mode for emergency situations. Constructed from high-quality ABS plastic, durable and odorless. Powered by a 6F22 9V dry battery (not included). Color: black + blue. Material: plastic. Package includes: 1 x Electronic Whistle. Other items not included. Note: Lighting and display differences may cause slight color variations. Measurement tolerance: +/- 1-3 cm.