Delkin Devices 512GB POWER 4.0 CFexpress Type B Memory CardTECHNOLOGICALLY ADVANCED SPEEDS Utilizing the latest CFexpress 4. 0 specification and offering maximum potential write speeds up to 3240 MB s , capture flawless cinema quality 8K, 6K & 4K RAW video at high frame rates and bitrates. Streamlined Workflow Offload data from card to computer quickly & efficiently at lightning fast speeds up to 3650 MB s for immediate access to your files and sooner post production start time. 512GB Storage Capacity PCIe