Feature: 1. GENERATE VOLTAGE AND CONTROL CURRENT: This generator can use 4‑20mA to generate voltage and control the current in the circuit 2. HIGH ACCURACY WITH LCD: Accuracy up to 0.01, come with LCD display, support rotary encoder adjustment, two terminals non polarity 3. SETTABLE OUTPUT RANGE: The output range can be set, 4‑20mA(device control) or to 21mA (signal debugging) 4. CONVENIENT CHECK: The display mode can be set for easy viewing of values, provide great convenience for your work 5. CALIBRATED OUTPUT: Linear output can be calibrated, actual output can be consistent with customer equipment display Specification: Item Type: Current Signal Generator Supply Voltage: 15-30V Output Range: 4-20MA Display Mode: Actual current, percentage, Hz Sampling Resistance: Less than 500Ω Output Accuracy: ±0.5% Display Accuracy: 0.01 Hole Opening Size: Approx. 77 x 40mm / 3.03 x 1.57in. Package List: 1 x Current Signal Generator 1 x User Manual