Compared with other similar products, our electronic whistle provides a loud, clear, strong and easily recognizable sound. The sound is loud enough to be quite effective in getting attention. This product could be the best choice for cheering, training basket and more. By the advantages of lightweight and compact size, our electronic whistle can be easily stored in your backpacks or sport bags without occupying too much space. And, it also can be used as a flashlight. It is constructed of ABS material. There are 3 different volume for you to adjust. Adjust the volume to the level that best meets your needs in different spaces and occasions. The length of this product is 14cm, width is 4.1cm and height is 3cm. This product is perfectly suitable for camping, hiking, school, outdoor, etc. Item Name: Electronic Whistle Material: ABS Battery: 6F22 9V(Battery Not Included) Features: Lightweight, Compact, Loud Sound Size Details: 14cm x 4.1cm x 3cm/5.51" x 1.61" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Electronic Whistle