FK-N1 Equipped with 3 T12 tips (T12-C4, T12-ILS, T12-K) featuring fast heating and long service life with strong oxidation resistance. Achieve rapid heating/reheating - as fast as just 9 seconds with the included 65W PD/QC adapter. This minimizes wait time and boosts repair efficiency. Get your soldering done effortlessly and safely. Temperature Calibration: The normal operating temperature range is 212-840°F. For temperature suitability issues encountered during daily soldering work beyond this range, the 65W digital display soldering iron provides a solution. Observe the temperature discrepancy between the thermometer and the iron's display, then adjust the corresponding value in the temperature calibration settings on the soldering iron.