Features: 1.Input voltage reverse polarity protection protects the current signal generator from being burned by reverse connection. 2.Adopting wirewound potentiometer to achieve smooth current adjustment to avoid the sudden change of resistance and other problems that caused by the general carbon film potentiometer. 3.Comes with an ammeter probe to give precise values. 4.It responds and outputs immediately with no delay after adjustment. 5.Universally suitable for signal source generation, valve regulation, inverter control, etc. specification: Input voltage reverse polarity protection protects the current signal generator from being burned by reverse connection. Adopting wirewound potentiometer to achieve smooth current adjustment to avoid the sudden change of resistance and other problems that caused by the general carbon film potentiometer. Comes with an ammeter probe to give precise values. It responds and outputs immediately with no delay after adjustment. Universally suitable for signal source generation, valve regulation, inverter control, etc. s: Product type: 4-20mA Signal Generator Material: ABS Input power supply: DC5-28V Current range: 4-20mA Input voltage reverse polarity protection: Support Package size: approx. 10.2 * 6 * 6 cm/ 4.0 * 2.4 * 2.4 in Package weight: 114g/ 4.0oz Package List: 1 * 4-20mA Signal Generator 1 * Adapter