GW Instek PSP-603 LCD Display Programmable Switching DC Power Supply, 0-60 Volts, 0-3.5 Amps, 200WSwitching power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices LCD shows voltage and current reading simultaneously and is readable in low light Voltage, current, and power limits provide greater control over output %+ and % modes modify the output by a preset percentage RS 232C interface connects to a computer for remote control with SCPI commands This Instek PSP series single output