Megaphone with hand grip microphone. Mouth diameter: 230mm Can be used as handheld or with supplied shoulder strap. Excellent for speaking events with larger audience such as parades auctions lifeguards and crowd control/safety. Features trigger button control and built-in attention getting siren. Powered by common C type alkaline batteries. Up to 1 km distance in line of sight. Weight 1.6kg without batteries. Power source: Alkaline x 8 (12vDC). Power 25W Max Length: 340mm Distance: 1km suburban / 0.5km city. Battery life 15 hours (intermittent use).