TIRED OF YELLING AND WHISTLING - Xflyee 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 - Xflyee 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 - Four 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 silver voice 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.