* Muti-Functional/Flashlight：This 2 in 1 Electronic whistle with light In the wild whistle is not only the role of sound, but also the role of light, which would be lifesaving signal whistles!
* Cost effective ：Battery Rechargeable so no need to buy batteries. For customers using multiple products, it's hard to exchange all the battery at a time. This product is equipped with only micro USB cable.
* Water resistant IP54：Lightweight and portable whistle is convenient to carry. Handheld size whistle is easy to use.No need to care about raining. You can also put it into the case, tie the whistle to your belt or shoulder straps for quick and easy to use in case of emergency.
* Two tone sound：Two distinct tone personalized whistle for your selection, you can choose the best sound for your demand.Suitable for all sporting events, referees, self defense anti wolf, sports training, travelling, hiking,
How to use
1. Hold light button for more than two seconds to turn it on and it will flash. After that, click it to light as it is.
2. Slide sound adjustment and turn on sound button
*For 1, PLEASE MAKE SURE YOU HOLD THE LIGHT BUTTON, not defective.