Full Specifications Capacity 32/64/128/256 GB Compatibility For microSDHC (32GB) card: Compatible with microSDHC and microSDXC host devices For microSDXC (64GB, 128GB, 256GB) card: Compatible with microSDXC host devices. Dimensions (L x W x H) 0.04" x 0.59" x 0.43" Speed Class UHS Speed Class 3 (U3) Video Speed Class 30 (V30) Sequential Read Performance Up to 100MB/s Sequential Write Performance Up to 40MB/s.
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