1、Indicates Open and Short Circuit: Our tester card can indicate open and short circuits for repairing unbooted motherboards, and is used to repair motherboard failures such as no boot, no display, no memory read, etc. It is an essential tool for repairing computer motherboards. 2、Easy to Use: This test board is very easy to use, just follow the normal operation process to operate successfully, even a novice can do easy testing with the right guidance. 3、No External Power Supply Required: This RAM memory slot tester is available without external power supply, which makes your work process easy. 4、LED Light: Our test card comes with LED light which can be used to clearly show the location of the problem for clearer viewing while working. 5、More Efficient: More efficient testing process provides smoother ability to improve the efficiency of workers and make the work process easier. 1 x RAM Memory Slot Tester Item Type: RAM Memory Slot TesterMaterial: PCBBattery: Coin cell CR2032 x1 (shipped without battery)Adaptation: DDR5 tester all support for INTEL, for AMD all DDR5 interface motherboard, with light emitting diodes to indicate the data line, address line open and short circuitUse: Used to repair the motherboard failure such as no boot, no display, no memory reading, is a necessary tool to repair the computer motherboard.