Harmony Fox 40 Whistle

I bought this whistle as plastic version and in black. It is quite light and the design is ingenious and good quality. It does work even when wet.

I blew as loud as I could and it was very piercing to the ears. I was so impressed that I bought one for my daughter for security when she walks to school.

It comes with a metal round key chain attachment and a round key chain. I bought a small bungy chord type rope and fixed the entire thing to the front of my backpack.