... , 2, 3,4,5,6 Hz Cooling method:inner circulation water cooling Power supply:AC110V± 10%, 50~60Hz; 230V±10%, ... after each continuous outputting of 5000 pulses. Cooling:Circulatory water cooling with distilled water III.Power supply power supply:AC AC110V± 10%, ... Screwing off the stopper on the water tank, then screwing it on tightly after adding distilled water fully. Fast DeliveryAfter Sale Service1) ...