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![9V Air Raid Siren Kit](https://images.findtheneedle.co.uk/findtheneedle/products/4698489.jpg)
A surprising loud siren for such a simple circuit. It uses a voltage controlled oscillator to drive the 0.5W loudspeaker provided...
For more information on 9V Air Raid Siren Kit talk to QUASAR ELECTRONICS LIMITED
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