Mingsford USB 3.0 High Speed Transmission Micro SD / TF Memory Card 128GBFeatures:? Great for cell phones, cameras, MP3 / MP4 player, vehicle traveling data recorder and more? Speed performance may be lower depend on host device, interface, usage conditions, the capacity you choose and other factors? USB 3.0, high speed transmission, save your time? Beautiful packaging, perfect gift? Mini design, easy to carry, can be put into pocketSpecifications:? 16G read speed is 20MB/s, write speed is 12MB/s? 32G read speed is 21MB/s, write speed is 13MB/s? 64G read speed is 40MB/s, write speed is 34MB/s? 128G read speed is 84MB/s, write speed is 23MB/s? Operating voltage: 2.7 - 3.6V? Operating temperature: 0 - 55 Deg.C? Storage temperature: -20 - 65 Deg.C  Package weight: 0.030 kgProduct Size(L x W x H): 1.50 x 1.10 x 0.10 cm / 0.59 x 0.43 x 0.04 inchesPackage Size(L x W x H): 12.80 x 7.50 x 0.20 cm / 5.04 x 2.95 x 0.08 inchesPackage Contents: 1 x Memory Card