VIOFO industrial grade microSD card for extended endurance, excellent performance, and reliability. Especially for high durability applications, ideal microSD card for dash cameras, and action cameras. Suitable for harsh conditions, waterproof, anti-X-ray, and anti-magnetic. Transfer speeds of up to 100MB/s. Support Ultra HD 4K recording. Take full advantage of ultra-high speed transfer rates, transferring files between card and computer will be quick and seamless. Optional Memory Card Recommendation VIOFO industrial high endurance microSD cards, optimized for dashcam recording, give greater assurances around compatibility and long-life durability, greatly elevating your dashcam owner experience. There are different options for your choice: 64GB/128GB/256GB/512GB. Length 5 cm, width 5 cm, height 2 cm, weight 0.5grams