The Amplivox SW230A30 Voice Carrier is a complete public address system in a rolling case. It includes a wireless lapel microphone with 15-foot cord, an optional wired handheld microphone, two 6" x 8" dual-module Jensen speakers (each with 40 foot cable), a 50-Watt amplifier with 3 microphone inputs, 3 adjustable tripods, and a carrying case with wheels and luggage handle. This unit will provide up to 200 hours of use with 10 D-cell batteries. The optional AC adapter (S1460, sold separately) allows the unit to be powered from an AC socket.