<b>Product Description:</b><br/>Color: Blue<br/>Material: ABS<br/>Sound: 3 tones optionalSize: 13.65 * 3.8 cmWhistle volume: 120 150 dBPacking list:1 Electronic whistle with lanyard<br/>4 pcs CR2032 batteries<br/> <b>Description:</b><br/> 1.【Three different tones】Whistle as an emergency signal, 3 tone function: tone 1/tone 2/tone 3 with switch. The electronic whistle with lanyard is designed with 3 different tones. You can choose the sound that best suits your needs to better use the electronic whistle. <br/> 2.【Durable】: The electronic whistle is made of high-quality ABS material, durable and sturdy, non-toxic, odorless, and harmless to you. You can rest assured to use it for a long time. Each electronic whistle is equipped with 4 CR2032 batteries, which you can use and replace. (Note: This battery is not rechargeable). <br/> 3. 【Easy to use, one-button operation】It is not too big, fits firmly in your hand, and can also disappear in your training jacket pocket, where you need to check.<br/> 4. 【Widely used】Electronic whistle for referees, coaches, teachers, ball games and outdoor activities such as rowing, running, animal training, camping, etc. <br/> 5. 【Hand whistle with lanyard】Equipped with a detachable hand lanyard. Small size, easy to carry. One-handed operation, simple and convenient, batteries included. Do not use the electronic whistle too close to the ear to avoid damaging the auditory nerve, and do not use it in small spaces such as rooms and venues. </div>