Dual Professional Wireless Microphone System Cordless Handheld Mic Kareoke KTVYou 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 frequencyWith dual volume controls and dual RF indicatorsIdeal 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 meterSpecification ReceiverConsume power3wSignal noise ratio80dBImagespurious rejection70dBBorder upon channel rejection70dBS Nless than 12dBu sind 20dB De emphasis50usPower supplyAC 110V 220V 10 50HzDimensions190 L x 140 W x 36 H mmMicrophoneRF Power output15mW MAX Spurious EmissionsOver 45dB carrier wareMicrophone elementunidirectionally dynamic microphoneBatteryTwo Standard AA battery for each included Current consumptionAbout 25mABattery lifeOver 8 hours continuous operationDimensions51 D x 243 L mmOverall systemCarrier frequency rageVHF 220 270MHzFrequency stability 20ppmDynamic rangemore than 80dBMaximum deviation range25KHzFrequency response40Hz 18KHz 3dBAudio output level0 400mV mix out 0 200mVT H D