The     MUSYSIC MU-V4L is for very high quality professional and reliable 4 channel     VHF wireless     Lapel / Lavalier & headset microphone systems. It uses the most advanced technology called SMT (Surface Mounted Technology) and is made of the highest quality surface mounted components to ensure     its quality and reliability. The MUSYSIC MU-V4L Quad 4-Channel VHF Wireless  Microphone System is a cost effective, multi-microphone solution that  supports simultaneous operation of up to 4 wireless microphones. The MU-V4L  Quad receiver features 4 discrete audio channels with level control and an  1/4" output per channel. Adjust microphone level separately using the level  controls on the front panel. This system includes 4 dynamic transmitters  with on/off/standby switches. The MUSYSIC MU-V4L Quad is ideal for  restaurants, bars, schools, presentations, small performances,  houses-of-worship, professional performance, or home karaoke and more.

Features:

• 4 Channel Receiver with 4 handheld Microphones     
• Individual volume controls on each Channel     
• 1/4" audio unbalanced output    
• 19" Rack Mountable 
• Range 120 feet (40 Meters)    
• AA Battery Handheld     
• Battery Life: 12 Hours

Specifications:

    OVERALL SYSTEM:

• Operating frequency: 170 - 250 MHz
• Frequency Stability: ±30PPm
• Modulation Mode: FM
• Maximum Deviation Range: ±80KHz
• Operating Range: 40m (120 feet)
• Temperature Range: 41f ? 113f 
• Frequency Response: 40 - 18000 Hz

    RECEIVER:

• Received sensitivity: -85dBm
• Power Supply: DC 9V-12V
• Audio output impedance: 600Ohms ±10% Unbalanced
• Audio output level: 0 - 0.7 V r.m.s
• De-Emphasis: 50uS
• Body Meterial: Metal
• Dimensions:  17.5?×10.1?×2.2?
• Weight: 1969g            

  BODY-PACK TRANSMITTER:

• RF Output: 10 mW
• Power Supply: 1.5V AA X 2 Battery
• Microphone: Condenser microphone
• Pre-Emphasis: 50uS
• Dimensions: 3.7? X 2.45? X .9?         
• Weight: 120g

Package includes:

• 1pc 4-channel VHF receiver 
• 4pcs Transmitters (Body Pack) 
• 4pcs Lapel Microphone Cable 
• 4pcs Headset Microphone Cable 
• 1pc 1/4" Audio cable 
• 1pc 110V-240V universal power supply