Specification:Frequency Range: FM121.7-128.7MHzFrequency Response: 100Hz-10000Hz (±3dB)Audio Distortion: Less than 1%Dynamic Range: 80dBOperating Temperature: 0℃-45℃Service ares: 10m/ 393.70"Transmitter Microphone:Type of Emission: FMS/N Ratio: 75dBRF outpupower: 8mw (50mw maximum)Frequency Deviation: 75KHzBattery: 9 V Battery (not included)Receiver:Type of receiver: FMS/N Ratio: 50dB220VPlug: EU PlugReception Mode: super heterodyne space diversityAudio Output level: >25mVReception Sensitivity: 30dB/ μVSize: Approx. 30.5x11.7x4cm/ 12.00x4.61x1.57"Package Included:1x Wireless Receiver2x Wireless Microphones1x Manual1x 6.35mm Jack Cable