Microphone Specification: Frequency range: 500MHz to 599MHz Modulation mode: Digital modulation PSK Audio sampling rate:48KHz Channel spacing:>300KHz Audio signal to noise ratio:>96dB Frequency response: 30Hz--20kHz Oscillation mode: VCO oscillation inside the chip Receiver Specifications: RF Bandwidth: 60MH Frequency Points: 2*50 Signal-to-noise Ratio: >105dB Receiving Sensitivity: 10-20dBuV Frequency Response: 80Hz-18KHz Distortion: <0.5% Dynamic Range: 96dB Receive Delay: 2.5 ms Battery type: Lithium Antenna: BNC/50O Sensitivity:-96dBm Harmonic interference ratio:>80dB False interference ratio:>70dB Package Includes: 2x Wireless Microphones 3x AA Microphone Batteries 1x 6.35 mm(1/4'') to 3.5 mm(1/8'') adapter 2x Anti Slip Ring 2x Mic windscreen 2x USB Charging Cord 1x User Manual