Price: US$2.54 Free Shipping Overview and Specifications: Buy Now Whistle can be widely used in outdoor, lifesaving, sports and other scenarios. The whistle has five major functions: compass, flint, storage box, mirror, whistle. The compass is a highly accurate oil-filled compass. Buy Now Leave a Comment Cancel reply Name Email MessageSave my name, email, and website in this browser for the next time I comment. Notify me of follow-up comments by email. Notify me of new posts by email.