Wireless microphone  System 4 channel
4 Handheld Whole Metal Mic
3 year free warranty

 
Features:
4 Channel 4 Handheld Whole Metal Mic
Individual Volume Control on each Channel
One 1/4" Mixed and four XLR" Individual Outputs
Perfect operation status indicater
2 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-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,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 
4 Handled  Whole Mic
Base Transmitter
US 110-240v Power Adapter
1/4'' Male to 1/4'' Male Phone Jack Lead