- Power Star Power Tester provides a clear LCD readout of the main ATX output voltages for quick at-a-glance verification. - A built-in buzzer automatically signals an alarm when a fault is detected, helping you identify bad rails without monitoring continuously. - Measurement coverage includes ATX output cables P4, P6, P8, SATA and IDE. For external DIE, SATA, P6 and P8 connections, indicators provide visual status, but there is no LCD voltage readout for these cables. LCD voltage display is provided only when connected to the 24-pin or 20-pin ATX connector. - Easy and intuitive to use: connect the tester to the ATX port of the power supply to quickly determine whether each rail is within normal range. - Compatibility: capable of detecting and evaluating power supplies and rails for ATX, BTX, ITX, TFX and other common form factors. - Use scenarios - Pre-assembly PC build: verify all rails are in spec before installing the power supply into the system. - Repair and diagnostic work: test a suspect or failed power supply to confirm which rails are out of tolerance. - Technician or repair shop workflow: quickly assess multiple rails on different power supplies to validate performance before reuse or sale.