PNY HP V125w 4GB. Capacity: 4 GB, Interface type: USB 2.0, Read speed: 15 MB/s. Width: 55.8 mm, Depth: 18.1 mm, Height: 9.1 mm. Operating voltage: 4.4 V. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -20 - 85 °C