Dual Handheld VHF Wireless Radio Microphone With ReceiverFor KTV MusicSpecifications:All around:Receive Frequency: VHF 220~270MHzFrequency Stabilization:+20ppmDynamic Range: more than 80dBT.H.D at 1KHz: less than 0.5%Frequency Response: 40Hz-18Hz+3dBTemperature Range: -10 to 50CManipulate Range : radio 200Fixed Receiver:Power Supply: AC220V/50HzConsume Power: 3 waterSignal/Nose Ratio:80dBImage Spurious Rejection:70dBS/N: less than 12dBuDe-emphasis: 50usHanding Microphone:Frequency Stabilization:+20ppmRF Output(h):+13dBmModulation Type: fm,f?fMax Deviation: 20kHzSpurious Emission :60dBBattery Voltage: 9V batteryPackage included:2 x Wireless Microphone (Not included Battery)1 x Receiver1 x Cable1x Adapter1 x User ManualDetail pictures: