Features: Max. Output range: max. -10V to 10V., 2/3/4-wire 0-22mA passive and source signal. Voltage output can be exactly 0.00V Output range can be 0-20mA, 4-20mA, 0-22mA, 0-1V, 0-5V, 0-10V, 0-2.5V, 0-3.3V, -5V to 5V, 1-5V, 2-10V, etc. output range is switchable and adjustable. Display modes can be: actual current/voltage signal value display, 0.0-100.0(%), 0.0-50.0 (Hz), can be set / switched by users. User can set 9 x fast signal output points, more convenient to do debugging. Have battery capacity status indicator, and battery voltage value display function. Support 24V operating power supply via wiring terminals and 5V from USB port, can be used in indoors or outside industrial site. 1000mAH 3.7V re-chargeable battery embedded inside, *Automatic stopping recharging battery when battery has been fully charged. Output accuracy can be calibrated by user, precision 0.01V, 0.01mA output and LED display output signal value accurately. Adjusting steps can be fine adjustment or rough adjustment, switchable. Have short-circuited protection circuits and polarity reverse connection protection circuits in signal generator. Refined user-friendly external shell, refined accurate encoders' knob to adjust output signal, more slim size. *Its default output range is 0-10V, 0-20mA, user can adjust it to make it output -10V to -10V, 4-20mA, etc., output ranges. *Output accuracy can be calibrated by user.