The SanDisk High Endurance MicroSD Cards provide the capacity, performance and exceptional reliability today's home security and dash cams demand. They're also protected against extreme temperatures, shock, water and x-rays, so you can be confident the evidence is there when you need it. They are Class 10 for Full HD video (1080p) recording and playback, and video speed V30. At-a-Glance - Ideal for dash cams and home monitoring systems - Designed for high endurance and durability so you can record for up to 20,000 hours with no worries - Record and save more Full HD or 4K videos with capacities up to 256GB - Built for and tested in harsh conditions; temperature-proof, waterproof, shockproof and x-ray-proof - Quickly transfer or back up videos to computer with read speeds up to 100MB/s - RescuePRO Deluxe one-year media recovery software (download offer) ​- 2-Year Limited Warranty Specifications High Endurance Recording: 256GB - 20,000 Hours, 128GB - 10,000 Hours, 64GB - 5,000 Hours, 32GB - 2,500 Hours Speed Class: C10, U3, V30 Transfer Speeds: 100MB/s read; 40MB/s write