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The B&K Precision single-output programmable switching benchtop DC power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices. The power supply unit (PSU) has one output that supplies adjustable voltage and current for a variety of applications. The LED screen shows the voltage and current reading simultaneously, and the display is readable in low light. Analog rotary encoder knobs on the front panel provide fine and coarse adjustment of the voltage and current output. The PSU's internal memory can store up to three output settings for future recall. The PSU can be controlled remotely via the USB interface on the rear panel, which can be connected to a computer (USB cable included), or the analog remote control terminal on the rear panel, which can be connected to a variable DC voltage source or variable resistor (remote control connector included). A software CD is included for remote control and testing applications. A power cord with a three-prong plug is included for connecting the PSU to a grounded outlet. A built-in cooling fan with three speeds helps prevent overheating.