2 In 1 USB2.0 Flash Drive + Ballpoint Pen 64G Black

Features：USB 2.0 interface.Supports hot plug & play, High speed USB 2.0 port.No physical drive required.Plug-and-play; no external power supply required, USB bus-powered.Support Windows computer systems,Can not support Mac system.speeds vary depending on types of file being transferred and computer configuration.Specifications:storage capacity: 8GB/16GB/32GB/64GBInterface: USB 2.0Environment Temperature: -40C - 70CStorage Temperature: -50C - 80CUSB Service Voltage: 4.5V-5.5VStorage Lifetime: More than 10 yearsUse A-class chip, can be erased repeatedly for 100,0000 timesOperating System: Win98/ME/2000/XP/ Vista/win7 /win8, Mac OS 9.X/Linux2.4 or aboveUSB connection: support Hot plug & Play.Easy to read and read in high speed, No need drive/power supply only plug in.About capacity:8GB = approximately 7.4GB-7.6GB16GB = approximately 14.4GB-14.8GB32GB = approximately 28.5GB-30GB64GB = approximately 58.5GB-60GB128GB = approximately 110GB-124GVendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MBCalculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB;So there are some differences between display capacity and nominal capacity of flash memory products.