Hikvision Ezviz Series Class 10 32GB 64GB 128GB 256GB Professional Surveillance Security Camera Memory CardExceptional Video Recording Performance: With write speeds up to 50MB s*, the EZVIZ MicroSD Cards are perfectly geared toward HD video work. Moving recorded data to your laptop is nearly effortless with read speeds up to 90MB s. Reliable and Durable: The EZVIZ memory cards are waterproof, shock proof, X ray proof, and can operate in temperatures ranging from 0C to 70C, so you can place them in harsh environments and still enjoy non stop security.