The Velleman Sound and Light Unit Soldering Kit provides four high-intensity LEDs that light up simultaneously and react to every sound. Suitable for a variety of fun and useful applications such as sound indicators, simple sound and light units for music.
The unit can also be used to indicate when a doorbell or telephone rings, which is especially useful for the hearing impaired. The kit also offers adjustable sensitivity via a potentiometer and a built-in microphone.