Review on Get Heard On The Field: Hipat Sports Whistles With Lanyard - Bulk Pack For Coaches, Referees, And Officials by Daniel Roe

For the price, these were really good. However, these are not as good as my police whistle that I used to have on the N.Y.P.D. Auxiliary. Seems like it will be loud enough but have to give it a go when I'm doing traffic. Each whistle has it's own package it comes in and a lanyard for each already attached. These are a little smaller than my police issued whistle which was a bit of a surprise. I hope this helps.