Make it so easy for coaches and referees: the electric whistle breaks away from the traditional way of blowing the whistle with the mouth, while providing a loud, clear, strong, and easily recognizable sound. It will be more convenient and safe in refereeing, training, and SOS. Three different high volume electric whistles can be adjusted: adjust the volume to the level that best meets your needs in different spaces and occasions, so that the sound can be heard and protect your hearing. For sports teachers, basketball coaches, referees, outdoor camping, dog training, and hiking lifeguards in SOS survival emergencies, this must be a great loud electronic whistle. The loudest electric whistle that conforms to ergonomics: the streamline appearance and compact size make the whistle more comfortable to hold and easier to use. One click switch can generate a volume of 120 5dB, which will be more hygienic and convenient in all sports events, company activities, school competitions, or other training. Durable and high-quality: Made of high-quality ABS material. More often than not, we use this electronic whistle outdoors, so it is necessary to have a crack and fall resistant shell. To ensure that you can use it outdoors for a longer period of time. If the sound is abnormal, please replace the battery. Portable: Portable, suitable for carrying in pockets and backpacks. We have also prepared a drawstring bag for you to better protect your whistle. It is also equipped with a 46 inch lanyard that can be easily threaded through the backpack or hung around the wrist and neck.