Brand New Husqvarna Earmuff with FM Radio for Chainsaw Helmets 578274902 Fits on Husqvarna & Petzl Helmets Hi-fi quality stereo radio. Automatic station locator. Low energy consumption, automatic shut-off after 4 hours, which saves batteries. All features are controlled by three distinct buttons, which makes for easy and safe operation. Low battery warning. Has 3.5mm aux/mp3 input socket Meets requirements of EN 352-1, 352-3. 352-6, 352-8 Supplied with 2 x AA Batteries