TIRED OF YELLING AND WHISTLING ? - Electric whistle is your best choice. Easy to get attention, loud, consistent sound every time. Electric whistle helps your voice at recess without blowing but also send louder, strong and consistent sound compared with traditional whistles. SUPERIOR QUALITY & ANTI-SPLIT - Sports electronic whistle is made of high quality ABS environmental protection material, non-toxic, tasteless and healthy. Anti-split strong design makes this electronic whistle create strong and consistent sound. HIGH VOLUME ELECTRONIC WHISTLE - 3 distinct tones personalized whistle for your selection, you can choose the best sound for your purpose. Suitable for all sporting events, and Alert for emergency situations where a threat to persons exists. ATTENTION PLEASE - F Our pcs Cr2032 Lithium Batteries are included. If the sound is abnormal, please replace the battery first. The positive side facing up and the negative side facing down as the pic showed, otherwise the product will not work. Please do not twist the position of the fish mouth, otherwise it will cause the product line obstruction and will not work. MULTI-FUNCTION ELECTRONIC WHISTLE - In the wild whistle is not only the role of whistling collection, but also the role of lifesaving Awesome high volume electronic whistle for P.E. teachers, coaches referees, sports training, outdoor camping, electronic dog whistle for training, hiking SOS survival emergency. About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.