【3 Adjustable Tones and Sounds】Our training whistle provides a loud, clear, consistent sound with a quick response at the press of a button and easy to attract attention. With 3 different tones and 3 adjustable volume levels to suit any occasion. The maximum decibel level is around 125 dB. Warning : Do not use near the ears. 【Premium Material】Made of durable ABS material with 3 tones and tuning function, comes with 1 detachable wrist strap, don't worry about sharing the whistle with this whistle hygienic electronics. Ideal for sporting events, camping, backcountry survival, dog training and more. 【Sanitary Solution】Compared to traditional whistle, our referee whistle is more economic. Instead of operating with the mouth, our portable electronic whistle uses a button, providing a hygienic solution for multiple operators, preventing the spread of viruses and bacteria. A thoughtful gift for your husband's coach, gym teacher, outdoor-loving boyfriend. 【Cleanliness and Hygiene】Traditional whistle requires you to blow with your mouth. Can you imagine the number of bacteria when you use the same whistle over and over again? Even if you clean the whistle frequently. So from now on, use an electronic whistle, manually operated, hygienic, easy to clean, and protect yourself from germs.