The WW-30 and WW-30T displays have a 4 to 20 mA or 0 to 20 mA current input (WW-30) and a 0 to 5 V, 1 to 5 V, 0 to 10 V and 2 to 10V voltage input (WW-30). The WW-30T features Pt100 and has resistant input. They have a power supply of 230 V AC +/- 10%.