4GB - A great multi-functional tool that every worker should have is the Dual Function Laser Pointer Memory Pen. This product is made with a brass cap and barrel to assure durability. Included with the pen is a laser pointer that can project up to 200 feet. That's not all the item also has a flash drive in the upper barrel of the pen. The flash drive is compatible with Mac OS 9.x and above and Windows 98.