1.temperature selection switch w 3 position (hot/off/warm), 110-127v/50-60hz; 2.power:120V-2000w/3750w; 220V-2200W/4400W , 3.min. water pressure: 1 mca.(1.5PSI); 4.max. water pressure: 40mca(55PSI), WATER 15 DEGREE, 5.MIN.: 1300 OHMSXCM 6.Voltage:Available for 110/230V 7.Frequency:50/60Hz 8.replaceable heating element, thermal fuse protection, pressure relief valve, CE approval