Voberry USB Pen Drive Metal Pure Copper Heart Key USB Flash Drive USB Key Genuine 8GB Interface: USB2.0 USB Service Voltage: 4.5V-5.5V; Environment Temperature: -40C - +70C ; Storage Temperature: -50C - +80C Operating System: Win98/ME/2000/XP/Vista/7, Mac OS 9.X/Linux2.4 Solid State Storage, Shock proof and electromagnetic proof Use A-class chip, can be erased repeatedly for 100,0000 times