Dual Professional Wireless Microphone System Cordless Handheld Mic Kareoke KTV<br>  You are looking at a Dual Channel Wireless Microphone Systems. It will bring you into a world where you can sing happily and help you take off tireness and stress，feel freely immediately!Just at home，you can have fun with your family and friends together!  Features:  Professional and Intelligent Dual Wireless Microphone System，uses the VHF 220-270 MHz segment，avoid the interference frequency With dual volume controls and dual RF indicators Ideal for professional use at any events: Karaoke， sound source recording and amplifying， vocal concerts， live-performances， conference， musical and opera， church， school， hall， family， party， etc... Distance 150 meter，open and spacious ideal usage distance 100 meter  Specification:                Receiver               Consume power         3w               Signal\/noise ratio         &amp;gt;80dB               Image&amp;amp;spurious rejection         &amp;gt;70dB               Border upon channel rejection         &amp;gt;70dB               S\/N         less than 12dBu(sind=20dB)               De-emphasis         50us               Power supply         AC 110V~220V.(&amp;plusmn;10%) 50Hz               Dimensions         190(L) x 140(W) x 36(H)mm               Microphone               RF Power output         15mW(MAX)               Spurious Emissions         Over 45dB carrier ware               Microphone element         unidirectionally dynamic microphone               Battery         Two Standard AA battery for each(included)               Current consumption         About 25mA               Battery life         Over 8 hours continuous operation               Dimensions         51(D) x 243(L)mm               Overall system               Carrier frequency rage         VHF 220-270MHz               Frequency stability         &amp;lt;+20ppm               Dynamic range         more than 80dB               Maximum deviation range         &amp;plusmn;25KHz               Frequency response         40Hz-18KHz+3dB               Audio output level         0~&amp;plusmn;400mV mix out 0~&amp;plusmn;200mV               T.H.D at 1KHz         &amp;le;0.5%               Service areas         150 meters               Temperature range         -10\u2103~50\u2103               Length of connecting cable         1.0m               Manipulate range         radio 200               Length of adapter cable         1.1m               Adapter plug type         EU\/US      <br>Package included:<br>2 x Dual Wireless Handheld Microphones1 x Receiver1 x 1\/4 inch connecting cable1 x Power adapter1 x English User Manual4 x AA battery<br>Detail Pictures: