Video of RWM4100VH:

Features:

• Rockville RWM4100VH VHF Wireless (4) HandHeld Microphone System Rack Mount
  
• High performance wireless hand held microphone system
  
• Includes RWM4100VH transmitter with (4) hand held, high sensitivity, unidirectional, wireless cardioid microphones
  
• Professional rack mount design
  
• Featuring a dual filter design to limit feedback and interference
  
• Individual microphone volume control
  
• Comfortable ergonomic composite microphone construction
  
• Low power consumption for longer battery life
  
• Ultra signal stability minimizes audio artifacts
  
• Operating Range*: 100´-200´(indoor), 65´-165´(outdoor)
  
• Channel: Four Channel
  
• Frequency Range: 175MHz-216MHz
  
• Frequency Stability: ±0.005%
  
• Modulation Mode: VHF
  
• Frequency Response: 50Hz-15KHz(±3 dB)
  
• Dynamic Range: 110dB
  
• S/N: 90dB
  
• T.H.D: < 0.1%(1KHz)
  
• Audio Output Jack: XLR balance & 1/4? Mixed
  
• Power Voltage: AC110V-240V 50/60Hz
  
• Operating Temperature: 14°F-122°F
  
• Mic Battery Operating Time: up to 8 hours

Click Here To View Owners Manual

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About Rockville Quality Control Procedures:
The Rockville brand stands for Quality, Innovation and Value. All Rockville products go through the most rigorous quality control standards in the industry. Products go through months of extensive testing before they reach your hands. All user functions are tested and all internal components are tested for quality. Rockville makes products that are virtually un-breakable! Rockville is one of the only brands in its class to test every concept model for weeks or months before starting production. Once production begins, Rockville sends product engineers to their factory to quality control every line of production. During production every product is tested and on top of that Rockville goes the extra mile and has their high level product engineers do an additional quality control. They test a certain percentage of all products from the production line a second time to ensure that the quality meets their vigorous standards, and to make sure that there is never a batch of products with even a slight problem. All Rockville products are backed with a hassle free warranty.