Metal construction, requires phantom power (9VDC), 50 ohm input/output impedance

• 1 AAA Battery
  
• Fixed Frequency
  
• Gain Control
  
• Operation Time About 7 hr.
  
• Works with Most Guitar Body Styles
  
• On/Off/Mute Switch
  
• Gain Adjustment
  
• 5 mW Output
  
• 135º Angle of Adjustment