Kit makes a voice controller that can turn circuits or devices on & off with sound. Kind of like the Clap On, Clap Off device.

Adjustable sensitivity and an LED to show the status of the relay are included in the kit. A cool way to control activities on you railroad or other devices in the home or office.

Kit comes with complete with circuit board, components,  instructions. Requires basic soldering skills and a 15 to 30 watt soldering iron. Solder is included

Another great kit to have fun with from Bakatronics

Have fun, that's what it's all about.