Professional Wireless Microphone Mic System UHF 2 Channel Dual Handheld Karaoke Specifications: Package Box Size: 40cm*28.7cm*7cm(L*W*H) Temperature Range: -10℃~50℃ Carrier Frequency: UHF 613-870MHz frequency Steadying: Less than 0.002% Modulating Mode: FM Audio dynamic range: Over 70dB Audio Frequency Responses: 100Hz-15KHz Audio output Level: 0-280mV S/N Ratio: Over70bdB T.H.D: Less than 0.5% Sensitivity: 3uV For 30dB S/N Features: - Wide frequency response,high S/Nratio. - Resist disturbing strongly,limit noise output. - High precision quartz crystal locked frequency technology. - No hitting when putting in the switch,so can protect the amplifier and Speakers. - With a complete working state and power level indication. - two microphone at the same time to sing without any disturbing caused by. - With a wide using range for over 100meters for compandor type or 50mters for non-compandor type in a good surrounding,for 40-60m for compandor type or 20- 30mteters for non-compandor type in a duplicate one. Package Included: 1 x Receiver 2 x Microphones 1 x Audio Line 1 x English Manual Notes: 1. Please allow 1-5mm error due to manual measurement and make sure you do not mind before ordering. 2. Due to the screen difference, the color may be a little different from what you expect, please allow it, thank you.