“what type and how many battery is required? can it be plugged and use with electricity if battery runs out?”

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• The Singing Machine SMM225P Microphone does not require battery for operation. It must be connected to a powered on Singing Machine Karaoke System to operate.

  Answered by SMC 9 years ago

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• There is no battery or power supply. You just plug it into a microphone jack and it works.

  Answered by Cody 8 years ago

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