1/2 Mile Bullhorn - 20 Watts H-4743 Enlarge Command attention! Be loud and clear for outdoor events or crowd control. 3 Settings: talk, siren, whistle. Adjustable volume control. Tough lightweight weatherproof ABS plastic. Pistol grip talk switch, easy-loading battery cartridge. Requires "C" Batteries or Rechargeable Battery. Sold Separately. Effective range up to 900 yards. Lasts up to 18 hours continuously.