HDT offers choices when deciding on which public address system you may need. Our shelter public address system includes an amplifier, mixer, power distribution panel, speakers, microphone, and cables; and our alternate public address system from Anchor Audio is a battery powered system that can operate for up to 8 hours on a single charge. It comes with built-in Bluetooth and can provide audio to large crowds. It is ideal for outdoor or indoor use. Both solutions come with carrying cases designed for rugged use.