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