Lightweight and powerful with new Piezo dynamic technology. Comfortable pistol grip and 3 modes of talk, siren and whistle up to 1 mile (1760 Yards) sound coverage. Weatherproof high impact plastic and steel. Battery indicator light shows power status (low, med, hi) on the outer housing. Easy to use battery cartridge. Volume/gain knob inside the cover for more control over the sound. Requires 8 C-cell batteries or optional S1405 rechargeable Lithium Pack. Lasts up to 40 hours continuously on 8 C-cell batteries and 8 hours on S1450 rechargeable Lithium Pack. Half the weight and twice the battery run time of other megaphones. Net weight of 2.0 lbs without batteries.