Bracelet usb pen drive for man (torovo industry group limited - http://www.Usb-drive-manufacturers.Com) Material: pvc-email:lily@torovo Dimension: 235mm* 22mm* 10mm(l&w*h) Weight: 21g-telephone:0086 755 3692 6927 Colors available: white, black, red, color customizable Logo methods: silkscreen printing/molding Certifications: ce, fcc, rohs M.O.Q.: 50 pieces Delivery time: 3-5 working days 24/48-hour rush service: not available Technical features: 1) interface: usb 2.0, or usb 3.0 optional 2) available capacities: 256mb, 512mb, 1gb, 2gb, 4gb, 8gb, 16gb, 32gb, 64gb, 128gb, 256gb 3) data transfer rate(usb2.0): 3-7mb/s for write, 12-15mb/s for read 4) operating systems: windows, vista, mac os, linux 6) data retention: 10 years minimum -