This digital LCD power supply tester is perfect for checking computer power supplies without having to turn on the PC. It supports a wide range of connectors, including floppy drive, PC, PSU, 20 pin, 24 pin, HDD, 6pin (PCI-Express), SATA, CDROM, 4pin (P4), and 8pin (Dual-CPU). It is compatible with ATX form factor and AX brand. This power supply tester is ideal for anyone looking to ensure their power supply is functioning properly before installing it in a computer.