2GB, 4GB, 8GB, 16GB, 32GB USB stick with CE & ROSH Certificates and custom logoUSB flash brief ... /s reading speed :12-20M/sAccessory choices:Manual ,CD drive, USB cable, lanyard, key ring, key chainOperating system:Windows XP, Windows ... Welcome to Shenzhen Worthspark CO.,LtdShenzhen Worthspark Co.,Ltd. is USB Flash Drive and power bank developing, manufacturing and marketing company ...