Two-in-one USB-C pen functions as a ballpoint pen and flash memory drive Black ink ballpoint pen has a universal refill design for long-term use Pen cap features a built-in USB-C drive with a 32GB capacity, allowing you to save up to 4,000 pictures, 7,000 songs, or 40 hours of video Stainless steel pen clip lets you clip it to your clothing or notebook for easy access Compatible with Windows 7, 8, and 10 and Mac OS X v10.6 and higher