Kestrel Blue Ocean Rugged Megaphone White/Blue. Use for up to a full day on a single charge or bring an extra rechargeable battery for peace-of-mind. Specifications for Kestrel Blue Ocean Rugged Megaphone: Manufacturer: Kestrel Battery Type: Lithium Features of Kestrel Blue Ocean Rugged Megaphone Waterproof and floats Range of 2000 yards at 22 W output (about 1.1 miles) Completely assembled in the USA Rechargeable battery - no more money wasted on new batteries MIL-STD-810G Transit Shock Standard Drop Proof Removable bumper (available in 13 different colors) to customize look and add protection Optimal shape designed to deliver the loudest clearest sound Siren and horn buttons Large dial volume and power buttons for easy adjustment and control 5 years warranty Package Contents: Kestrel Blue Ocean Rugged Megaphone Kestrel 0100MIL: Blue Ocean Rugged Megaphone Tan/Olive Kestrel 100: Blue Ocean Rugged Megaphone White/Blue Kestrel 100: Blue Ocean Rugged Megaphone White/Blue