Product Description Color: Orange, Black, Blue Material: ABS Sound: 3 tones Size: 13.65*3.8cm Whistle Volume: 120 ~ 150 dB Package includes: 1 x electronic whistle with lanyard 4 x CR2032 batteries 1. Three different tones whistle as emergency signal, 3 tone functions: Tone 1/Tone 2/Tone 3, with switch. Electronic whistle with lanyard designed with 3 different tones. You can choose the sound that best suits your needs for better use of your electronic whistle. 2. Durable: The electronic whistle made of high-quality ABS material is durable and sturdy, non-toxic, odorless and harmless to you. You can use it for a long time with confidence. Each electronic whistle comes with 4 CR2032 batteries for you to use and replace. NOTE: This battery is not rechargeable. 3. Easy to use, one-button operation. It is not too big, fits the hand very well, and can also disappear into the training jacket pocket, you need to check the position of the whistle button. 4. Widely used electronic whistles are suitable for referees, trainers, teachers, ball games, and outdoor activities such as rowing, running, animal training, and camping. 5. The hand whistle with lanyard is equipped with a detachable hand strap lanyard. Small size, easy to carry. One-hand operation, simple and convenient, battery included. When using the electronic whistle, do not put it too close to your ears to avoid damaging the auditory nerve, and do not use it in small spaces such as rooms and venues.