This signal generator support external 15-30V operating power, 5V micro USB port, and built-in lithium battery, 4 digits brighter LED display, two decimal points accuracy, output can be calibrated, high accuracy, 2 decimal point output, 0.01V, 0.01mA. Features: Have rough and fine adjusting modes, the rotation turns is settable. Have one switching button to switch between current and voltage output. Current and voltage output simultaneously, output wiring terminals are independently. Have 2-wire, 3-wire, 4-wire current outputs. (Support active and passive) Multiple output range: 0-3.3V, 0-5V, 1-5V, 4-20mA,0-20mA, etc. Output range is settable and programmable. Programmable multiple display mode: current voltage value display, 0-100% display, 0-50.0Hz display. Output terminals have short-circut protection, power terminals have polarity reverse connection protection. Infinite rotation knob, high accuracy long life span encorder to adjust output. Mush more stable and accurate than the potentiometer type. Small size comfortable external shape: alloy adjustable knob, elegant external case, easy to carry. Pluggable wiring terminal blocks, very convenient to do wire connection. Specifications: Current output range: 0-22mA adjustable Voltage output range: 0-10V DC adjustable Voltage output power: max. 100mA Battery: 3.7V, 1000mAh Item size: 100 * 60 * 25mm / 3.9 * 2.4 * 1.0in Item weight: 100g / 3.5ounce Package size: 100 * 60 * 25mm / 3.9 * 2.4 * 1.0in Package weight: 100g / 3.5ounce Package list: 1 * Signal Generato