TOPESEL 20PCS 4GB Bulk USB 2.0 Flash Drives Swivel Memory Stick Thumb Drives Pen Drive (4G, 20 Pack, Black)

TOPESEL USB Flash Drive Features:  1. Every Piece Tested and Formatted Before Delivery.  Available in Black, Black/Silver, Blue, Green, Red, Orange colors.  3. Available in1GB, 2GB, 4GB, 8GB, 16GB capacities. Specifications: Chip: Grade A, original brand flash memory chip Interface Type: USB 2.0. Backwards compatible to USB 1.1 Writing speed: 3MB/S-6MB/S Reading speed: 6MB/S-12MB/S Compatibility: Desktop, Laptop, Mac, Tablet, Speakers, Television, Car video system which has USB port Operating System: Windows 98second edition/NT/ME/2000/XP/7/8.1/10 and above /Linux/ Mac OS 10.3 and above Operating Temperatures: 32° to 140°(0° to 60°) Storage Temperatures: -4° to 185° (-20° to 85°) Durability: 50,000 times read and write Package Included:  20 x 4 GB Bulk USB Flash Drives