Kingston Digital, Inc. HyperX Max 3.0 256 GB Flash Drive SHX100U3/256G USB-IF SuperSpeed-Certified Compliant with USB 3.0; compatible with USB 2.0 Sequential Speed Read: up to 195MB/sec. Write: up to 160MB/sec. No driver required Aluminum casing No additional power required; utilizes USB BUS power Performance - high speed data transfer and storage Guaranteed - three year warranty