ZHT Electronic Whistles for Referees with USB Charging, 3 Tone High Volume Emergency Whistle for Coaches Teacher, Outdoor Safety Whistles with Lanyard-2 Pack Black & Yellow Color

【Clean and hygienic】:Stop use traditional whistle-you donot have to take off your mask especially at this particular time!It is a best gift for coach and PE teacher,our electric whistle can be used by multiple people, reused, and easy to carry.
【Large capacity & USB Charge】It to create strong and consistent sound, and this whistle can last for 15000 blasts, It is 10 times more durable than ordinary button batteries and USB charging save the cost of buying batteries.
【3 Level Volume Whistle】 Three distinct tone personalized whistle for your selection, you can choose the best sound for your demand. You can use it for any sports activities such as sports games, animal training,outdoor camping. It is an excellent device for referee, coaches, teachers, team leaders, especially for elder people who needs careful attention and safety emergency help.
【Easy to Carry】Hand whistle have perfect size:5.35in×1.57in, weights about 80g, also equipped with a long 6.54in lanyard, which can easily loop through backpack, sailboats, camp hike gear, life jacket, kayak PFD.You can also tie the whistle to your belt or shoulder straps for quick and easy use in case of emergency.
【Electronic Whistle】This electronic whistle is easy and simple for you to use. Just Open the power,press the button and then it works. Electronic whistle is made of high quality ABS environmental protection material, non-tasteless and healthy, can avoid mouth contact, can provide up to 120-150 dB sound power, which is your best choice in this special period.