Up to 100MB/s transfer read speed 667X support high read and fast file transfer speeds. Without equipment encumbrance, you are easy to fulfill data read and file transmission in a short time. (Based on the internal test environment of Netac, so the actual speed may vary with different host devices and environments. For devices that don't support UHS-I, the transmission speed will be different due to interface limitations.) | UHS-I (U3), Speed Class 10, Video Speed Class 30 (V30) support smooth as well as continuous shooting and Full HD video (4K) recording. For apps, A1 (App 1) performance helps not only run faster by microSDXC card, but also save devices' storage space memory. (Based on Secure Digital 5.1, A1 performance is 10MB/s continuous read and write speed or 1500 read IOPS, 500 write IOPS. Netac TF card’s actual performance will have some discrepancy due to difference of hardware/software platform. | Netac 64GB microSDXC UHS-I Memory Card supports up to 1.5 hours 4K UHD videos recording, up to 4 hours full HDD videos recording, 7,000 photos, 2,500 songs. (1GB=1,000,000,000 bytes. Due to different capacity algorithms and partial capacity are used for system files, management and performance optimization, so the actual available capacity may be less than the identifying capacity.) | Netac microSDXC memory card supports IPX7 waterproof (at the water depth of 1m after soaking for 24hours), shock proof (drop test passed), extreme temperature resistance between -25℃ and 85℃, X-ray radiation proof, anti-static and mechanical impact of 500G acceleration. Strong and Durable! | Ideal for Android smartphone, tablet, action camera, 360° camera, drone, dash camera, camcorder, high-res photos, gaming, music, DSLR's, driving recorder, digital SLR camera, surveillance camera, sport camera, Bluetooth speaker, VR, computer and laptop. Netac TF card is compatible with all MicroSD and wide application of full-size SD card if you have suitable SD adapters, such as compatible with Galaxy, Huawei, Xiaomi, Redmi, Vivo, realme, OPPO, Reno, Nintendo Switch, Fire Tablet, 3DS, DJI.