Transmitter, Conductivity/Resist, Auto/Fixed, 100-240VAC (+/-10%), 50/60Hz, 4W, -30 to +130C, Lg. LCM w/Auto-SB+Text/Chart/Trace Mode Display, RS-485, Wall/Pipe/Panel Mount, 96x96x132mm,1/4DIN,w/2x Panel Mount Clips, 1x Precis Driver