Kingwin Digital Power Supply Tester with LCD Screen – Compatible with ATX, ITX, IDE, HDD, SATA, and BTX, Easy-to-Use Diagnostic Tool for PC Power Supply Testing (Aluminum)

Customers find the power supply tester works well, showing accurate voltages and being simple to use. Moreover, they consider it a great investment that's useful for quick diagnostics. However, the compatibility receives mixed feedback, with several customers reporting it doesn't work with power supplies. Additionally, the instructions are criticized for being lacking.