CaseBuy 10pcs 1GB Flash Drive with Activity Indicator Light - Bulk Variety Pack - USB 2.0 Swivel Design with 10 Color Lanyards (1GB,10 Colors) GREAT VALUE INVESTMENT: includes 10 pack of 1GB Usb Flash Drive(Every PCS test before shipping) + 10pcs mix colors lanyards(7 inch(in full)) EASY-TO-USE: just plug in and use it! Supports Windows 7/ Windows 8 /Vista/XP/2000/ME/NT Linux and Mac OS. Compatible with USB 2.0, backwards USB 1.1. GREAT FOR ALL AGES AND PURPOSES: suitable for digital data storing, transferring and sharing in school, in family, to friends, to clients, to machines. Apply to data storage of music, photos, movies, designs, manuals, programmes, handouts etc ACTIVITY INDICATOR LIGHT DESIGN: these have an "activity indicator LED light" to signal that they're being written-to. The black one and the blue one will not see activity indicator light as the deep color block the light 100% MANUFACTURER'S WARRANTY: we stand behind of our products and guarantee to the original purchaser for a period of one-year limited warranty from the original purchase date. If you find your usb flash drive is defective or damaged or you are simply not happy with it in any way, simply send it back and we will send you out a free replacement or refund you money. In every customer relationship, CaseBuy strives to be a trusted partner and seek to achieve 100% in customer satisfaction