Usage Tips:Description This product is anelectronic whistle, made of solid materials, safe and durable. It can serve you for a long time without being easily damaged. The product is an excellent electronic whistle that can bring you more convenience, allowing you to have a more comfortable experience. Features - Color: Blue -Material:ABS, electronic components, magnet - Size: 14.00X4.30X3.30cm/5.50X1.69X1.30in Battery: 6F22 (not included) Sound: 120-150dB - The electronic button whistle can avoid mouth contact, very suitable for referee coaches, P.E. teachers, navy, outdoor camping, sports competitions, traffic guides, pet training, self-defense emergencies. - With 3 shades and 3 levels to meet different needs. High volume, can provide up to 120-150 decibels of sound power. - Easy to get noticed while also producing a louder, stronger and more consistent sound than traditional whistles. - An LED light, which can be used for lighting or outdoor camping. It can also be used as an emergency flashlight, and can also send out SOS lights, which is convenient for outdoor distress signals. - This electronic whistle is made of high grade ABS material, longer use time and more durable. Packing list1 x electronic whistle1 x manual