Features 1. A 1*20/24-pin power supply tester for ATX/SATA/HDD power supply 2. Helps prevent electrical issues by allowing periodic testing of power supplies to identify potential problems before they affect system performance; enables voltage output monitoring 3. Green LED indicator illuminates when the device is functioning properly 4. Compatible with 4PIN, 6PIN, and 8PIN HDD power connectors, as well as 20PIN and 24PIN FLOPPY connectors; supports comprehensive testing for ATX power supplies 5. Durable plastic construction with plug-in design; suitable for testing PC 20/24-pin, PSU, ATX, SATA, and HDD power connections Specifications Material: ABS Size: Approx. 9 x 7 x 2.8 cm (3.54 x 2.76 x 1.1 inches) Color: Black Package List 1 x Power Supply Tester Note Power tester instructions: Power on the supply unit to be tested Verify that the seven indicator lights on the right (+3.3V, -12V, PG, +5VSB, +12V, -5V, +5V) illuminate; all lights should be lit for proper operation