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The Siren Kit from Velleman is a novel kit that will generate 4 different sounds, including police siren, fire brigade, emergency vehicle and machine gun.
Voice / Sound activated switch kit. Supplied in component form with full assembly instructions. The asembled kit provides a switch circuit which is operated by voice or sound.
The LED Traffic Light Kit from Velleman is a miniature four way traffic light as seen at many junctions, and is aideal for model railroads, exhibitions or as a toy.