1. The power supply does not turn off quickly. Press the off button and it takes 3 to 4 seconds to turn off the power supply. Very irritating. Turning on the supply is more normal.2. There is no fine tuning. The Voltage and current knobs can be difficult to adjust. Especially at low settings.3. This power supply does not seem to work well at very low current and voltage settings. (Very difficult to impossible to set below 1 Volt and milliamps.) And the current and voltage reading are not accurate at low settings. At higher voltage and power setting it works well and the reading are accurate.I would not purchase this again.
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