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Vista M22: How to Replace the Batteries

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The M12 amplifier can use either 2 "AA" batteries or an AC power supply (sold separately): 
  • UK Power Supply - P/N 30007-102
  • Euro Power Supply - P/N 30285-102
The battery compartment of the amplifier is located on the left side of the unit. To replace the batteries:
  1. Remove the battery cover by pushing it down towards the bottom of the amplifier.
  2. Insert the two AA batteries into the amplifier. Be sure to match the + and - symbols inside the compartment.
  3. Replace the battery cover by sliding it up into place.
  • When the batteries are low, you will hear three beeps through the headset.
  • You also have the option of powering your amplifier using an AC power supply, which is sold separately

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