PNY HP C325w 4GB. Capacity: 4 GB, Interface type: USB 2.0, Read speed: 15 MB/s. Width: 21.48 mm, Depth: 11.2 mm, Height: 72.04 mm. Operating voltage: 4.4 V. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -20 - 85 °C