■ ELEKIT PS-3001S Sound Sensor with Relay This is a sound sensor unit for enthusiasts, built over a decade ago. It can turn the power ON/OFF with sound. Originally, I planned to attach it to a motorized toy, but after completing the unit, it was stored untouched. I confirmed its functionality when I built it, but I haven't been able to verify it recently. Therefore, I've described the "product condition" based on appearance, but I'm listing the main unit as "junk." I couldn't bear to throw it away, so I'm putting it up for sale. Interested parties, what do you think? ■ Product Contents Please check the photos. Everything in the photos is included. Although it's a completed product, you'll likely need some knowledge to read the instructions to actually use it. Please refer to the instructions for the power supply (uses batteries: 6V-8V) and the location of the output section. ※ Please understand that the evaluation of the product condition varies from person to person. Also, please be aware that this is a handmade item and product inspection is done by an amateur, so there may be oversights or misinterpretations. This is a personal item, so if you are concerned about the product condition, please refrain from purchasing.