Optimized for use in DSLRs, camcorders, portable audio recorders and other handheld devices, the Delkin Devices Select UHS-I (U1/V10) SD memory card delivers write speeds reaching up to 30MB/s for smooth, continuous Full HD 1080p video & still image capture. The card is also rated Video Speed Class 10 (V10), guaranteeing a minimum sustained write speed of 10MB/s and ensuring that data is written swiftly to the card, preventing recordings from randomly stopping or frames from being dropped. Capable of offloading data at speeds reaching up to 100MB/s, the Select SD card ensures quick, efficient data transfer from card to computer for immediate access to your files and sooner post-production start time. Built to endure even the most strenuous shooting environments, the Select SD card is durably designed to be waterproof, shockproof and X-ray proof. In addition, the card also utilizes built-in error-correction and wear-leveling to ensure data integrity and a long lifespan. Each card is furthermore backed by a Lifetime Warranty and Delkin's American-based customer support team out of San Diego, CA.