1、It checks to the voltage on all wires to ensure that the power supply is functioning properly. 2、An essential tool for any computer technician. 3、Allow you to quickly diagnose or rule out problems with the power supply, which should the the first thing you check when diagnosing computer problems. 4、Easy to use, just plug in connectors and green LEDs illuminate to show which pins are getting power. 5、There is a detailed operation on the product. Features: It checks to the voltage on all wires to ensure that the power supply is functioning properly. An essential tool for any computer technician. Allow you to quickly diagnose or rule out problems with the power supply, which should the the first thing you check when diagnosing computer problems. Easy to use, just plug in connectors and green LEDs illuminate to show which pins are getting power. There is a detailed operation on the product. Specification: Connector: Floppy, HDD, CDROM, SATA, 4 pin(P4), 8 pin(Dual CPU), 6 pin(PCI-Express) Voltage Source: 20/24 pin(ATX-connector) Material: Sturdy plastic Color: Black Package Weight: 71g Quantity: 1pc Package included: 1 x Power Supply TesterNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.