Review on Xflyee Electronic Whistle: USB Rechargeable, Adjustable Tones For Referees, Coaches & Teachers | Perfect For Outdoor Activities, Boating, And Safety by Kurt Bravo

I am a teacher and sometimes I have problems with my voice. My students responded to my commands very well. I use in cafeteria, gym or different part of the school and this is the best option and now is part of my life. I bought a package another one to my mom, she is 79, she use when she take a shower in the bathroom she advise me for an emergency. Another for my husband knee surgery for an emergency too. This is great to have in house, games, work, emergency, etc. The best thing is that rechargeable in just 10 approximately. I love this product!