Finally an affordable wireless microphone set that frees you to move about like a singing star! Why be tethered to a microphone cord? Sing like a concert star and roam about the stage as far as 200 feet from your base station. It"s easy...... connect the PDMW2000 base station to any karaoke player or stereo component with microphone inputs and your wireless connection powers on with the same featurs of echo, volume and key control found on your karaoke player. The PDMW2000 comes with a built-in channel lock to block out any other wireless signals plus special hard casing on the microphones for durability. Pyle"s PDMW2000 Wireless Microphone System features: freq. range of 160-250 mhz, freq. response: 40Hz - 15k Hz and 80 dB S/N ratio. The effective field of this system is 30m, battery life of the microphones is 8 hours, and audio output level of the receiver is 25 mV with an output impedance of 600 ohms. Power Supply: AC 110/220V Includes 2 cordless microphones, two 1/4" patch cords, wireless receiver, and two 9-Volt batteries to power each (color coded) cordless microphone. One year manufacturers warranty included within retail package