Features Response Fast: The adjustable current signal generator with knob operation, adjust output response fast, no delay. The current can be finely controlled within the allowable range. Polarity Protection: The power port has polarity protection and will not damage components when the power is reversed. The reverse connection of the power supply will not damage the components, which greatly protects your appliance. Wide Application: The adjustable current signal generator with functional excellence. Can be used for signal source, valve regulation, output meter test, LED test, analog transmitter. Terminal: To test whether the output is normal, you can use a multimeter to short the "4-20mA output" terminal. Easy to use, easy to connect and good performance. Long Serve Life: The adjustable current signal generator made of high-quality electronic components, with stable performance and long service life. Specification: Item Type:Current Signal GeneratorPower Supply: DC 12V or 24V Current: 4-20mA Total Power: <1W Output Load Impedance: 0-350 Ohms (DC12V); 0-800 Ohms (DC 24V) PCB Board Size: 50 x 50mm / 1.97 x 1.97in Package List: 1 x 4~20mA Signal Generator Module 1 x Users Manual English Package List 1 x 4~20mA Signal Generator Module 1 x Users Manual English