The sports whistle with good sound, compatible with sharp and loud, does not use a pea as a core, which can be easily blown, and its volume and pitch can be controlled; In addition, the training whistle can be used on many occasions to attract the attention of others, portable with space saving. Versatile use: the whistle requires simple manual operation and is fully controllable at any time, even during training and games, so that you will not be out of breath. It can also be used as a portable outdoor sports whistle, dog trainer, etc. durable and easy to clean, so you can use it with confidence. The hand whistle is particularly hygienic, because it does not need to come into contact with the mouth, and you do not need to worry about, it can be used by many people. Color: red + blue Material: PVC + PP Package Contents: 2 x Whistle Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm. Welcome to our store! Happy shopping and a happy day! We release new popular items every week, and the store dynamics will be synchronized with the information. If you like to try new things, remember to come and have a look~ Non-customized products support 30-day unconditional return and exchange, and respond to your after-sales needs within 1484 hours