This super-sensitive sound-to-light converter incorporates a built-in microphone which captures any ambient sound and lights six high brightness LEDs which react to the different sound levels. It can be used for fun, as a one channel sound-to-light unit, or to indicate a ringing telephone or doorbell for the hearing impaired.

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Supply voltage: 9V DC / 50mA. Includes 9V battery snap. Battery not included.