Low fever: 1.2V working voltage, lower consumption, keep working at low temperature, and run more stable.Low consumption: DDR4 memory is faster and saves . The operating voltage is reduced from DDR 1.5V to DDR4 1.2V, saving 20%.Transmission bandwidth:PC4-21300Capacity: 4GBFrequency: 2666MHzFunction: DDR4 288PINScope of application: DesktopPlease note: Different batches, product appearance and color may be different, does not affect the use.Colour: blackMaterial: PCBSize: 13.5x3cmPackage Contents:1 * RAM2 * Cooling Vest (the appearance and color are random, don't accept the specified appearance and color)2 * Sticker (the appearance and color are random, don't accept the specified appearance and color)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.