Sleek and compact, a technical marvel! Recommended by outdoor enthusiasts, adventure guides, hikers, and cyclists. The Fox 40 Micro is ergonomically designed, compact, small and flat and has no pressure points. Attach it to anything – life jackets, clothing or backpacks! Simple, tiny and works perfectly. Design: 3-chamber pealess. Sound Power: 110 dB.Available in 6 colors.