ZPEN has several features which you generally don’t find in ordinary pen. The most unique feature of ZPEN is hidden HD Camera which separates it from other pen. It has 3 modes (Video & Audio, Audio & Photo). Its HD camera is capable to create 720p HD video with audio. ZPEN has a button to boot the system. Once the system is started, it records everything automatically. It supports microSD Card Slot up to 32 GB. Company is providing 1 year guarantee. If your product has errors, it will be replaced. If it happens within 30 days, money will be refunded. They are providing some other features also such as free tech support and free shipping.