Bluck Flash Drives come as a 10-pack of 16GB USB drives and a 10-pack of 4GB USB drives, with 20 lanyards included. These versatile storage solutions are suitable for business projects, events, giveaways, or personal use, helping you organize and share files with ease. Durable and portable design: pocket sized at 2.27 x 0.75 inches. The 360-degree metal swivel cap protects the USB port, and the rugged aluminum casing withstands daily wear. A detachable lanyard allows easy attachment to your keychain or bag to prevent loss. Zero-setup convenience: plug and play with no software to install. Works on Windows XP, Vista, 7, 8, 10, and 11, and is USB 2.0 backward compatible with USB 1.1 ports for older laptops or car stereos. LED indicator: the LED at the end lights up when plugged in and blinks during read/write activity. To maintain data integrity and extend drive life, avoid removing the drive during transfer. Use scenarios: share project files or presentations with colleagues at meetings, distribute promotional content at events, or back up photos and documents while traveling. Specifications: two capacities (16GB and 4GB) in packs of 10 each; dimensions 2.27" x 0.75"; 360-degree metal swivel cap; rugged aluminum casing; detachable lanyards; USB 2.0; Windows compatibility.