The PWMA970 is a portable PA/mobile entertainment system on wheels, and it's packed with all the latest and greatest features. It's equipped with an iPod dock connector that charges your iPod or iPhone and lets you play your favorite music over the powerful 300 watt speaker. It has four ¼" inputs on the front, each with its own volume control, for a total balance of sound. You can also connect any other digital music player using the retractable 3.5mm cable, listen to AM/FM radio, and plug in an SD card or USB stick to listen to MP3 and WMA files. And this unit can be totally wireless - it runs on a rechargeable battery for up to 5 hours of life and includes a two wireless handheld microphones. It all plays through our powerful 8" three-way speaker including a woofer, mid-range, and tweeter for full-range sound. Tweak your sound using the bass and treble controls, and apply an effect with the echo knob. The telescoping handle and caster wheels make transportation simple and easy. Runs on 110 V or 220 V. We have also added the PMKSM20 Microphone and Tripod Stand With Extending Boom & Mic Cable Package. The PMKSM20 is our live/studio vocal performance starter kit. Get crystal clear audio with the included handheld dynamic microphone, built with smooth mid-frequency presence rise for excellent voice projection. Mount it on the included tripod microphone stand with an extending boom, complete with a glossy black finish. And connect it all using the 15 ft., quarter-inch (1/4") microphone cable. Stand height adjustable from 3.3 to 5.5 ft. Boom length 7.5".