1. Passive two-wire 4-20mA current loop, wiring fully compatible with 2, 3, and 4 wire systems 2. 0.01 precision, liquid crystal display, encoder knob, terminal block has no polarity 3. Configurable coarse and fine adjustment mode, number of turns can be set 4. Adjustable output range: 4-20mA (control equipment) or 3-21mA (debug signal) 5. Selectable display modes: actual current, 0-100.0%, or 0-50.0Hz 6. Linear output with calibration capability 7. Option to automatically store output value 8. Programmable automatic curve output with 1-9 segments 9. Set 2-9 preset points for quick output adjustment; knob allows direct recall of saved currents Technical specifications: Power supply voltage: 15V – 30V Output range: 4-20mA / 3-21mA Display modes: Real Current / 0-100.0% / 0-50.0Hz Sampling resistance: Less than 500 ohms Output accuracy: 0.5% Display accuracy: 0.01 Color: Photo Color Material: Plastic Size: 79.5 x 42.2mm Package contents: 2 x Signal generator Note: Light reflection and different displays may cause slight color variations between the item in the picture and the actual product. Measurement error allowed within +/- 1-3cm.