You’ll need a power supply (sold separately) to run these feeders. Choose one based on how many soldering tools you plan on using. Each tool will need one channel. WR power supplies automatically recognize your tools, so you can switch between a wire feeder, soldering iron, desoldering iron, or hot air iron without changing temperature settings. Use the USB connection to adjust standby temperature and the automatic shutoff timing. This also allows you to log soldering temperatures and update station firmware.