WANJOTEC EW001 Push Button Electronic Whistle 1. Material: ABS 2. Buttons: OnOff, Volume, Tone 3. Volume: Adjustable 4. Maximum Volume: 125-+5dB 5. Suitable for various scenarios: various competitions, mountain climbing, traffic control, pet training, outdoor activities, nighttime self-defense, coaching, lifeguarding, physical education teachers, etc. 6. One-touch sound activation: just press and hold the sound button to activate. 7. Easy to use, convenient size, and portable 8. Clean and hygienic: No mouth-blowing required, reducing the risk of bacterial and viral transmission. Multiple people can operate the whistle, and you can hold the whistle while talking. 9. Adjustable volume, suitable for indoor and outdoor use. 10. Comes with a cord for hanging around your neck or on a wall, keeping your hands free. 11. Do not point the whistle at anyone, as excessive sound may damage hearing. 12. Replace the batteries immediately if you notice any abnormal sound from the whistle.