4. can set the output range: 4-20MA (control equipment) / 3-21MA (debug signal) 2. 0.01 , liquid crystal display, encoder knob, terminal block is not positive or negative 1. passive two-wire 4-20MA current loop, the wiring is fully compatible with 2, 3, 4 wire system 3. can set the coarse and fine adjustment mode, the number of turns can be set 5. can be set display mode: actual current / 100.0% / 50.0HZ, Weight: 0.1322773572 pounds, Manufacturer: Jaywool