Audio Wireless microphone 
 4 Channel 2 Cordless Handheld  2 Lavalier Mic UHF Wireless Microphone System
(our company maintenance department is in Brooklyn &Los Angeles)
(our company offer 3 year free warranty)
.
.(This Microphone system comply with new FCC frequency rules)

Features:
  • 4 Channel Receiver with 2 Cordless Handheld & 2 Lavalier Microphone
  • Individual Volume Control on each Channel
  • One 1/4" Mixed and four 1/4" Individual Outputs
  • Perfect operation status indicater
  • Four Telescoping Receiver Antennas
  • Broad frequency response range, super low distortion
  • Full metal design
  • Use 2*1.5V battery 
Specifications:

Overall System
  • Number of Channels:4 channels
  • Carrier frequency range:500MHz-600MHz
  • Stability:±0.006%
  • Normal deviation:±22kHz
  • S/N ratio:<120dB
  • T.H.D:<0.6%
  • Frequency response:50Hz-15kHz
Receiver 
  • Sensitivity:>80dB
  • Audio output:Balanced and Unbalanced
  • Power requirement:AC 16V,400mA
  • Dimensions:440×210×40mm
  • Weight(weight):Approx.1.3kg
 
Wireless Microphone 
  • Cartridge:Dynamic
  • Antenna:Built-in
  • RF output:<10mW
  • Normal deviation:±22kHz
  • Maximum deviation:±80kHz
  • Battery:1.5V battery
  • Battery life:>8 hours
Comes With 
  • 2 x Handheld Microphone
  • 2 x Lavalier Microphones
  • Base Transmitter
  • US Power Adapter
  • 1/4'' Male to 1/4'' Male Phone Jack Lead