GoSpeak! is an ultra-portable amplification system capable of projecting voice or audio to an audience of up to 200 people with high-quality omni-directional stereo sound. Two flat-panel speakers provide superior audio clarity and power with room-filling NXT SurfaceSound technology. GoSpeak!'s high-band wireless microphone system delivers outstanding sound quality up to 300 feet away. At a slim two and half inches and a total weight of less than five pounds, GoSpeak! is ultra-portable, folding up and sliding easily into a laptop tote bag. The versatile design provides inputs for both microphone and external audio and has two volume controls to create just the right balance. The simple three-step set-up process is easy for anyone to master. Make yourself heard in meetings, training sessions, speeches or lectures with GoSpeak! SPECIFICATIONS Frequency Repsonse: 100Hz - 10Khz±3db Line-in Sensitivity: 1Vp-p Line Impedance: 50K ohm Input Sensitivity: -55db±2db (0 db=1V/pa) Input Sensitivity: -55db±2db (0 db=1V/pa) Weight: 4.8 Lbs Dimensions: 13.4" x 8.7" x 2.6" NXT® Technology with Surface Sound™ Power Output: 2 x 20 Watts per channel FEATURES CONNECTIONS Microphone In: 1/8" mini phone plug XLR and 1/4" compatible via separately purchased adaptor Stereo line input: 1/8" mini plug Stereo line output: 1/8" mini plug WIRELESS MICROPHONE Frequency Modulation Modulation Sensitivity 6 mV input for full deviation Battery 9V alkaline (included) Battery Life 8 hours nominal Subminiature omni-directional condenser microphone only, terminated for use with PRO 88W transmitter Clip and windscreens (included) WIRELESS MICROPHONE RECEIVER Reception System FM Super-heterodyne Reception Sensitivity 2 mV for 30 dB S/N DC Input 9V DC (center-positive) Battery 9V alkaline (included) Battery Life 8 hours nominal