Wireless microphone system Specification:Pickup Pattern: Uni directionalWireless Mic Type: UhfDisplay: LCDSignal Stability: 541.9MHz, 546.3MHz, 561.6MHz, and 568.65MHz UltraSensitivity -96dBmMic Battery Type: AaRange: 50-150 meters or 492 Feet (depending on surrounding obstacles)Connector Type: Xlr connector, 6.35mm jackMaterial Type: MetalFrequency range: 500MHz-980MHzModulation mode: Digital modulation PSKAudio sampling rate:48KHzChannel spacing:300KHzAudio signal to noise ratio:96dBFrequency response:30Hz--20kHzOscillation mode: Vco oscillation inside the chipReceiver Specifications:Antenna: Bnc/50OHarmonic interference ratio:80dBFalse interference ratio:70dBPower consumption:=2WAudio output:F6.35 socket mixed unbalanced output XLRPackage Information:1x 8 Channel UHF wireless receiver8x Handheld wireless microphone4x Antennas1x Power adapter1x Audio cable1x User Manual8x Anti-rolling rings16x AA Batteries