Lightweight and powerful with new Piezo dynamic technology. Comfortable pistol grip and 3 modes: Talk, Siren, and Whistle with up to a 5/8 mile (900 Yards) sound coverage. Weatherproof high impact plastic and steel. Battery indicator lights (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 6 C cell batteries that lasts 18 hours continuously. Half the weight and twice the battery run time of other megaphones.Net weight 2 lbs. without batteries.Forget the hassle and cost of constantly replacing multiple batteries. Using the Rechargeable Lithium Pack (Not Included) saves you money from purchasing batteries, can be reused hundreds of times and last for years. A fully-charged battery will provide 8 hours of typical operation (defined as speaking 35% of the time at mid volume) and over one year of standby / idle time.