Features: This 4 in 1 DDR3/DDR4/DDR5UDMM/DDR5RDIMM memory tester diagnoses hardware faults through LED indicators, supporting comprehensive testing for desktop and servers rams module with open/short circuit detection. Featuring two power supply mode (CR2032 battery or Type C fast charging) and manual operation, its metal plastic construction ensures durability while LED brightness variation pinpoints faulty data lines during memory diagnostics. for PC repair technicians and IT professional maintaining desktop computers, servers, or troubleshooting common memory issue like dirty contacts, PCBs fractures, and damaged data line resistors. Quickly identify memory module faults including oxidized gold fingers, broken traces, and defective memory chip through visual LED feedback, streamlining hardware troubleshooting for both home workshops and professional repair centers. Equipped with rechargeable CR2032 battery support and simultaneous charge test functionality, this diagnostic tool offer friendly operations with redness/green charging indicators for uninterrupted troubleshooting. Specifications: Materials: Metal + Plastic Color: Redness Size: 15.5x19x2.50cm/6.1x7.48x0.98inch Package Includes: 1PC Memory Tester note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.