Round USB Flash Memory Drive Hardware: PC, Notebook or Macintosh with USB port Operating system: Windows 98/SE, ME, 2000, XP, and Mac OS9.1 Only Windows 98/SE needs the driver Storage media: NAND flash memory USB host interface: USB 1.1/2.0 Speed: Reading speed: 1,015Kbps Writing speed: 950Kbps (USB 1.1) Reading speed: 8Mbps Writing speed: 4Mbps (USB 2.0) SLC Reading speed: 6Mbps Writing speed: 2 to 3Mbps (USB 2.0) MLC Capacity: 32, 64, 128, 256, and 512MB, 1, 2, 4, and 8GB (optional) Operating current: <104mAh Suspend current: <86mAh Data retention: over 10 years Led indicator: light flashing when reading and writing data Operating temperature: -10 to 55°C Storage temperature: -20 to 55°C Operating humidity: 20 to 90% RH Storage humidity: 20 to 93% RH Supports boot-up: USB ZIP and USB HDD