Very easy to carry.Have current voltage signal output and measurement function. Have current input to voltage output signal conversion, voltage input to current output signal conversion functions. clear color LCD display input and output signal accurately, one screen task display or upper lower screen display. Accurate 0-24mA active or passive signal output, 0-12V, 24V output. Accurate 0-24mA 0-30V input measurement function. 0.01mA, 0.01V accurate output and input measurement function. clear color LCD display input and output signal accurately. 2000mAH capacity rechargeable battery inside, can be used in the lab or in industrial site. Have one button fast output, automatic ascending, descending and cycling output mode. Customized min. output value and max. output value are settable. Colour:Black Material:plastic Size:90x70x28mm Package Contents: 1 * Signal Generator Only the above package content, other products are not included. Note: Light 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.