1) Capacity of silicone USB BRACELET/USB/USB bracelet:128MB, 256MB, 512MB, 1G, 2G, 4G,8GB ... 1.1 and 2.0 available USB/USB bracelet Description (1) Material of Silicone USB drive/USB/ ... silicon rubber ,harmless for body ,Green material(2) Bracelet size : 208mm circumference*18mm width*2mm(3) Embossed ... (6) Driverless installation in Windows 98, 2000, XP, Vista and Mac. OS 9.0 Silicone USB drive bracelet