Breakthrough flat panel Surface Sound™ speaker technology from NXT® makes clear and rich omni-directional stereo sound possible in such a small package. Add sound effects and music to your presentation by connecting your computer or other auxiliary audio system.There is no complicated set-up just plug in the speaker connect a microphone and you are ready to start speaking. So bring along GoSpeak! Pro and start winning over the world...one audience at a time.Features Fills venues 100-200 peopleSize: fits in laptop totebagWeight: < 5 lbs.Setup: less than 5 minutesRecommended Wireless Mic Specifications: •Frequency Repsonse: 100Hz - 10Khz±3db •Line-in Sensitivity: 1Vp-p •Line Impedance: 20K ohm •Input Sensitivity: -64db±1db (0 db=1V/pa) •Weight: 4.85 Lbs •Dimensions: 13.4 x 8.7 x 2.6 •NXT Technology with Surface Sound Connections: •Microphone1 In: 1/4” and XLR •Microphone2 In: 1/8” jack •Line In: 1/8” input •Stereo Line Out: 1/8” output