Our portable wireless PA amplifier has a built-in speaker and a lapel and headset microphone. It features a cassette play/record function, and a lapel and headset microphone. It is a completely self-contained portable PA system that is great for lectures or demonstrations. An additional microphone/AUX input will also work with the wired microphone. It uses a 35 watt 12V DC/110V AC power source. It is available in four different frequencies, channel A-171.90, D-209.82, B-184.54, and D-203.30. A version of this PA system that comes with a deluxe hand held microphone can be found under model number PAW-350H.