Haydels Game Mr Squirrel Whistle. It works Excites squirrels makes them bark and at times move toward your location. Specifications for Haydels SW92 Small Game Mr Squirrel Whistle: Mfg Item Num: SW92 Supplier SKU: 81060 Category: GAME CALLS Type: Squirrel Call Species: Squirrel Material: Metal Battery: None The Haydels SW92 Small Game Mr Squirrel Whistle is a quality addition to the Haydels lineup. For more great deals on Game calls on sale and available for your next hunting trip by Haydels please browse our Haydels Hunting Gear page.