- Intuitive LCD display: the LCD shows the output voltage with clear, easy-to-read readings for quick diagnosis of power rails during testing. - Automatic error alarm: a built-in buzzer automatically sounds when defects are detected, helping you monitor the PC power supply and respond promptly. - Versatile output wire measurement: measures P4, P6, P8, and IDE cables. includes a light indicator for external DIE, P6 and P8 ports, so port status is visible at a glance. - Compact and portable: compact, lightweight design suitable for professional technicians and everyday users. no multimeter needed—just connect to the ATX port of the power supply. Use scenarios: - Build and test: verify multiple rails before powering a new PC or upgrade to ensure stability. - PSU replacement: quickly check output after installing a new power supply in a workstation or gaming PC. - On-site service: diagnose suspected PSU or cable issues in customer systems without carrying bulky equipment.