The Digi-Chip 128GB Micro SD memory cards are ideal for any device that uses the Micro SD memory card format such as smartphones, dash cams, action cams, laptops, digital cameras and security cameras. This memory card is fully compatible with the Samsung a15 and Samsung Galaxy a25 smartphones. They are high speed Class 10 memory cards with fast data transfer read/write speeds. The full specs are below. All of our memory cards are made using Samsung memory chips and we offer a lifetime warranty on them. We have been selling memory cards online since 2006 and Digi-Chip is our own brand. These memory cards are SD-3C licenced products. We also supply a full sized SD adaptor with our Digi Chip Micro-SD memory cards to allow you to use the memory card in a full sized SD device if desired. Digi-Chip Micro-SD memory card specifications: 128GB Micro SDXC: Class 10 UHS-1 U3 App speed A1, Video speed V30, Read speed 90mb/s, Write speed 50mb/s 128GB is compatible with all Samsung A15, A25 phones Pack includes: Digi-Chip Micro SD memory card, Full sized SD adaptor, Plastic memory card case