Speed Class: U3. 4K Ultra HD Video Shooting & Recording. Performance:Up to 100 MB/s read, 30MB/s Write (32GB), 45MB/s Write (64GB,128GB). Format:FAT32 (32GB), exFAT (64GB,128GB). The card has been extensively tested and proven to be waterproof, temperature proof, shock and vibration proof and X-ray proof.
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