Steam Engine Sound Generator with Whistle Kit

• Power supply: 9V battery (not incl.)
• Comes with 8 ohm/0.5W miniature speaker
• Dimensions: 3.9" x 3.3"

Generates sound of a vintage steam engine. Adjustable 'speed' and volume. Great for model railroads, radio plays, stage, as gadget. With 'steam whistle'-push button.