This external signal generator support 15-30V working power, 5V micro USB port, and built-in lithium battery, 4 digits LED display brighter, the precision of two decimal places, the output can be calibrated, high accuracy, 2 decimal point output, 0.01V, 0.01mA. Features: Having rough and fine adjustment modes, the turns of rotation is adjustable. Have a switch key 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, 0-20, etc. Output range is adjustable and programmable. Programmable multiple display mode: voltage value current display, 0-100% display, 0-50.0Hz display. Output terminals are short circuit protection, power terminals have reverse connection polarity protection. Infinite rotation knob, long life high precision stringer to adjust the output. Mush more stable and accurate than potentiometer type. Small size comfortable outer shape: adjustable button alloy, stylish outer case, easy to carry. Pluggable wiring terminal blocks, very convenient to make wired connection. Specifications: Output current range: 0-22mA adjustable Output voltage range: 0-10V DC adjustable Output power Voltage: max. 100mA Battery: 3.7V, 1000mAh Item size: 100 * 60 * 25mm / 3.9 * 2.4 * 1.0in Item weight: 100g / 3.5oz Package size: 100 * 60 * 25mm / 3.9 * 2.4 * 1.0in Package Weight: 100g / 3.5oz Package List: 1 * Signal Generato