...0 mW max. (not including Amplifier Unit) Indicators MS (Green/Red), SS (Green/Red), RD (Green), SD (Green) External input Request input When ON: 0 V short-circuit or 1.2 V max. When OFF: Open...https://www.ia.omron.com/data_pdf/cat/zp-l_q362-e1_2_3_csm1130069.pdf