Stereo audio amplifier boosts sound 50 times. Great for the-hearing impaired (e.g. when watching TV), as a gadget, science project, with volume control and on/off switch.

Specifications

• power supply: 3 x 1.5V AA batteries (not included)
• dimensions: 62 x 54 x 44mm / 2.4 x 2.1 x 1.7 inches

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