AmpliVox(R) S601R Mity-Meg 15-Watt Megaphone (Li-Ion Compatible)

15W; Effective range: 900 yards; Battery indicator lights show power status; 3 modes: talk/siren/whistle; Adjustable volume; Easy-to-use battery cartridge; Requires S1402 rechargeable Li-Ion battery pack or 6 C batteries;