1, passive two-wire 4-20MA current loop, the wiring is fully compatible with 2, 3, 4 wire system 2,0.01 precision, liquid crystal display, encoder knob, terminal block is not positive or negative 3, can set the coarse and fine adjustment mode, the number of turns can be set 4, can set the output range: 4-20MA (control equipment) / 3-21MA (debug signal) 5, can be set display mode: actual current / 100.0% / 50.0HZ linear output, can be calibrated can be set to automatically store the output value programmable automatic curve output cycle 1-9 segment can set 2-9 points to quickly adjust the output, the knob directly calls these currents Technical indicators: 1.1Power supply voltage:15V---30V; 1.2Output range:4-20mA/3-21mA; 1.3Display mode: Real Current / 0-100.0%/ 0-50.0Hz; 1.4Sampling resistance:Less than 500 ohms; 1.5Output accuracy:±0.5%;Display accuracy:0.01 Colour:grey Material:plastic Package Contents: 2 x Signal generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.