1. passive two-wire 4-20MA current loop, the wiring is fully compatible with 2, 3, 4 wire system 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 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