Megaphones can be large and heavy, especially when you add the batteries. But, our 8W mini megaphone takes 6 x AA batteries (available as an extra) and weighs in at just 620g. It can be used for fire evacuation control, temporary fire alarm cover, sports events and any kind of announcement. The range of use in clear conditions is up to 700m. The unit includes a volume control, siren and a carry strap. This megaphone is ideal for indoor use.