The Digi Chip 64GB Micro-SD Class 10 memory card is a high speed memory card made using the highest quality Samsung memory chips. This 64GB Micro-SD UHS-1 memory card is perfect for the latest tablet pcs mobile phones and smartphones. They are fully compatible with Amazon Fire 7, Fire 7 Kids, Amazon Fire HD8, HD8 Kids, Fire HD10, Fire HD 10 Plus, Fire HD 10 Kids Tablet PCs. They are also UHS-1 spec which stands for Ultra High Speed meaning they are some of the fastest mobile memory cards on the market. We offer a lifetime warranty on all Digi-Chip products. microSDHC and microSDXC Logos are trademarks of SD-3C,LLC. Digi-Chip memory cards are SD-3c licenced.