Traditional Pocket Whistle传统口哨 带小球挂绳孔 响亮！

本口哨采用一体化打印成型设计，造型为传统的口哨造型，在吹气处，设计了流动图案造型。

This whistle is designed with a one-piece printing and molding design, featuring a traditional whistle shape. At the blowing point, a flowing pattern design is incorporated.

口哨内部含有一个小球，打印完成后可以使用小工具从开口处捅一下，即可使小球松动。

The whistle interior contains a small ball. After printing, you can use a small tool to poke it through the opening to loosen the ball.