Features easy to operate: a few minutes to learn, define the instantaneous heating of metal objects, application range of various metals partial or integral quenching, annealing 1. High efficiency and energy saving: 2/3.2 than the high frequency of electronic tubes. Particularly lightweight: only 16-40kg suitcase size. 3. Low maintenance costs: no vulnerable, expensive electronic tubes. 4. Particularly safe: no high voltage, avoid the danger of high voltage electric shock. 5. Simple installation: Connect power supply and water pipe only, 10 minutes can complete. 6. Easy to operate: a few minutes can learn.