The Thermaltake AC-069-OO1NAN-A1 Dr. Power III ATX Power Supply Tester is a versatile tool designed for modern ATX power supplies, supporting up to ATX12V v3.1. With its comprehensive design, it can detect sideband signals and includes a PCIe 12+4pin connector. The LCD display provides real-time monitoring of output voltage for +12V, +5V, +3.3V, and +5Vsb, allowing for quick and clear assessment of power supply performance. It also features a built-in diagnostic system for proactive maintenance, detecting issues such as low-voltage, high-voltage, and PG alarm systems. A red backlight and "beep" sound will alert users to any potential problems during testing. Trust in the accuracy and reliability of the Dr. Power III PSU Tester, backed by a 3-year warranty.