Enfain USB 3.0 Flash Drive 16GB Retro Mixtape USB Memory Stick Creative Cassette Tape Design, Thoughtful Gifts for Husband, Boyfriend on Valentines Day, Anniversary, Birthday 1 pack of cassette tape design USB flash drive USB 3.0, backwards compatible to USB 2.0 and USB 1.1 16GB memory capacity, hold up to 3000+ songs ( 4mb/song) Suitable for retro gifts on birthday, Valentines, Anniversaries for the special ones 30-day money back guarantee; 12-month manufacturer's warranty <span class="a-text-bold">MODEL:</span> Cassette design <span class="a-text-bold">CASING MATERIALS:</span> Plastic <span class="a-text-bold">SIZE:</span> 4&#034;x2.48&#034;x0.47&#034; ( 10.2x6.3x1.2 cm) <span class="a-text-bold">CHIP:</span>Grade A, original brand flash memory chip <span class="a-text-bold">INTERFACE:</span> USB 3.0, backwards compatible to USB 2.0 and USB 1.1 <span class="a-text-bold">OPERATING SYSTEM:</span> Win 10/ 8/ 7/ Vista/ XP/ 2000/ 98/ ME/ NT Linux and Mac OS. <span class="a-text-bold">SPEED:</span> Write speed: 15MB/S and above; Read speed: 30MB/S and above <span class="a-text-bold">OPERATING TEMPERATURES:</span> 32 F to 140 F (0 C to 60 C) <span class="a-text-bold">STORAGE TEMPERATURES:</span> -4 F to 185 F (-20 C to 85 C) <span class="a-text-bold">DURABILITY:</span> 50,000 times read &amp; write