Soldering, rework and desoldering stations are units comprised of the key components of a soldering operation: power supply and regulation, soldering iron, iron stand and sponge. The power supply generates heat to make the soldering iron work. It commonly has a digital readout and manually operated controls. The controls allow the operator to set the output temperature of the tip while the readout indicates the actual ongoing temperature of the tip. This helps prevent overheating, the most common concern in soldering.