The BK Precision 1739220V Low Current High Resolution DC Power Supply, 30V/1A, 220VAC Line Input can be operated locally from the front panel or remotely through the RS-232 interface. Using a MOSFET circuit design and high quality components with very low temperature coefficients, the 1739-220V is extremely stable and capable of outputting current as low as 1 mA with a 100 uA settable resolution. Two 4-digit LED displays continuously monitor the output voltage and current.