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. Supports coarse and fine adjustment modes, 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. Configurable 2-9 preset points for quick output adjustment, adjustable via knob 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: Approx. 79.5 x 42.2mm Package contents: 2 x Signal generator Note: Light reflection and differences in display screens may cause slight variations in item color as shown. Measurement error allowed within +/- 1-3cm.