1、2 In 1 Tool: DDR4 DDR5 memory tester, 2 in 1 memory tester tool for laptop DDR4, DDR5 memory for seamless memory testing. Use it to ensure the quality of your laptop's memory modules during the testing process. 2、Memory Failure: Computer memory failure is mainly due to poor contact of gold pins, worn out gold pins, PCB damage, data cable exclusion damage, open and shorted memory, and poor memory. 3、LED Indicator: DDR4 DDR5 memory tester with LED indicator for testing all data lines of the memory, normal brightness is considered normal. When there is a hardware failure in the loop of these data lines, bright or not bright is not normal. 4、Purpose: To check the wear and tear of the gold pins, to rule out any damage, and whether the PCB is disconnected. If the test indicator flashes, it means the gold pin has poor contact. If no indicator light is on, there is a broken hardware fault. 5、Easy To Use: Insert the CR2032 battery into the battery holder of the memory test card, or connect the USB C cable, then insert the memory card for testing. Perfect for technicians and computer enthusiasts.