Audio Wireless microphone  
 (4 Handheld meta Mic 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)

Our store has 2 sets difference  frequency with system 
 Frequency range (520MHz-580Mhz)

Attention: The microphone cannot be sent to Puerto Rico

Features:
4 Channel Receiver with 4 handheld metal Microphones
Individual Volume Control on each Channel
One 1/4" Mixed and four XLR Individual Outputs
Perfect operation status indicater
Two 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:520MHz-580MHz
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,1000mA
Dimensions:440×210×40mm
Weight(weight):Approx.3.3kg
 
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 
4 xHandheld  Microphones 
Base Transmitter
US 110-240v Power Adapter
1/4'' Male to 1/4'' Male Phone Jack Lead