Velleman MK103 Sound To Light Unit Kit DIY Stem Soldering Kit Item specifics: Condition - New: A brand-new, unused, unopened, undamaged item Brand - Velleman MPN - MK103 Recommended Age Range - 13+ Character Family - STEM DIY KITS UPC – 836479007024 Product description: Four very bright LEDs simultaneously react to any sound and illuminate. This sound-to-light module with a built-in microphone is suitable for various fun and practical applications, such as a sound indicator or a simple light organ. The soldering kit can also be used to indicate when the phone or doorbell rings, which is particularly useful for the hearing impaired. You can adjust the sensitivity with the potentiometer. The soldering kit operates on a 9 V battery (not included). Learn the basics of electronics through engaging projects. The kits offer step-by-step instructions and clear explanations, allowing both beginners and experts to learn and experiment. This kit requires soldering of components to the PC board while building. Soldering required Ages 13+