... output: 4-20mA current output; relay control output;RS-485Feature Two wire 4-20mA outputMeasure range:0-5m,10m,15mOutput:4-20mAResolution ... )Display:4 bits LCDWork model: measure span or level optional4 wire outputMeasure range:0-5m,10m,15m,20mOutput:4-20mA, RS485Resolution ...