Specifications:Item model number : AUSDH16GCL4-RRAM Size: 16 GBDimensions : (L x W x H) 15 x 11 x 1.0 mmWeight: 0.25 gramsVoltage: 2.7 ~ 3.6 VPerformance Speed (Read): 10 ~ 14 (MB/sec) **Speed (Write): 4 ~ 5 (MB/s) **Memory Card Type: Micro SDHCSpeed Class Speed Class: Class 4Compatibility with mobile phone / smartphone / tablet