This is the Delkin 64Gb microSDXC Memory Card 660x (V30) [DDMSDW66064G]

The Delkin microSDXC Memory Card 660x (V30) is a Class 10 microSDXC UHS-I Memory Card. It is a available in various capacities for saving and storing HD, 4K, and 3D video and it features speed class U3 compatibility with a minimum write speed of 30 MB/s. Along with enhanced minimum write speeds, this microSDXC memory card offers a maximum data read speed of up to 99 MB/s and a maximum data write speed of up to 80 MB/s to help ensure your data is transferred quickly and efficiently. The included SD adapter, complete with a built-in write protect switch, allows you to place the microSDXC card into devices compatible with a standard SD memory cards, such as DSLRs, camcorders, point-and-shoot cameras, and more. Also included is a protective tote.

Features:
UHS-I / U3 / Class 10
Max. Read Speed: 99 MB/s
Max Write Speed: 80 MB/s
Min. Write Speed: 30 MB/s
Records Full HD, 3D, 4K, and HFR Video
Records Time-Lapse & Photo-Bursts
Records Protune & HDR
Dust / Water / Shock / X-Ray Proof
Write-Protect Switch on SD Adapter

Specification:
Card Type microSDXC
Bus Type UHS-I
Speed Class 10
UHS Speed Class U3
Speed (X-rating) 660x
Data Transfer Read Speed 99 MB/s Maximum
Write Speed 80 MB/s Maximum
Write Speed 30 MB/s Minimum
Durability Dustproof, Shockproof, Temperature Extremes, Waterproof, X-Ray Proof
Operating Temperature 32 to 158°F/ 0 to 70°C
Error Correction Yes