AmpliVox SB601R Mity-Meg 15-Watt Megaphone (Bundled with rechargeable battery)

15W; Effective range: 900 yards; Battery indicator lights show power status; 3 modes: talk/siren/whistle; Adjustable volume; Easy-to-use battery cartridge; Works with S1402 rechargeable Li-Ion battery pack; Bundled with rechargeable battery pack--requires 8 C batteries if not using the battery pack;