Features: 1.21300 Bandwidth: DDR4 memory type, 21300 Bandwidth, 19 19 19 19 43 CL, 1.2V operating voltage, suitable for desktop computers. 2.2666MHz Frequency: Excellent performance with a frequency speed of 2666MHz, backward compatible with lower frequencies (2400MHz and 2133MHz). 3.Improved Responsiveness: 4GB RAM improves system performance by speeding up load times, improving system responsiveness and increasing the system's ability to handle larger workloads. 4.Stable Performance: Laptop memory provides stable and excellent performance, compatibility and stability support for all major platforms, and dramatically improved responsiveness. 5.Effective Heat Dissipation Efficiency: Metal casing, superb heat dissipation system, effective heat dissipation efficiency to ensure stable operation. specification:Item Type: 4GB DDR4 RAM Material: PCB, Metal Capacity: 4GB Memory Type: DDR4 Frequency: 2666MHz Bandwidth: 21300 CL: 19-19-19-43 Operating Voltage: 1.2V Applicable: Desktop PC PackageList:1 x 4GBDDR4RAM